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Band-pass</title> <meta name="description" content="Search results for: Band-pass"> <meta name="keywords" content="Band-pass"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" 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class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Band-pass"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 15</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Band-pass</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15</span> Tunable Photonic Microwave Bandpass Filter Based on EOPM and VPBS</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=R.%20Heydari">R. Heydari</a>, <a href="https://publications.waset.org/search?q=M.%20R.%20Salehi"> M. R. Salehi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A tunable photonic microwave bandpass filter with negative coefficient based on an electro-optic phase modulator (EOPM) and a variable polarization beamsplitter (VPBS) is demonstrated. A two-tap microwave bandpass filter with one negative coefficient is presented. The chromatic dispersion and optical coherence are not affected on this filter. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Bandpass%20filter" title="Bandpass filter">Bandpass filter</a>, <a href="https://publications.waset.org/search?q=EOPM" title=" EOPM"> EOPM</a>, <a href="https://publications.waset.org/search?q=photonic%20microwave%20filter" title=" photonic microwave filter"> photonic microwave filter</a>, <a href="https://publications.waset.org/search?q=polarization%20beamsplitter." title="polarization beamsplitter.">polarization beamsplitter.</a> </p> <a href="https://publications.waset.org/6369/tunable-photonic-microwave-bandpass-filter-based-on-eopm-and-vpbs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/6369/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/6369/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/6369/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/6369/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/6369/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/6369/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/6369/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/6369/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/6369/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/6369/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/6369.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1659</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">14</span> Numerical Analysis of All-Optical Microwave Mixing and Bandpass Filtering in an RoF Link</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=S.%20Khosroabadi">S. Khosroabadi</a>, <a href="https://publications.waset.org/search?q=M.%20R.%20Salehi"> M. R. Salehi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, all-optical signal processors that perform both microwave mixing and bandpass filtering in a radio-over-fiber (RoF) link are presented. The key device is a Mach-Zehnder modulator (MZM) which performs all-optical microwave mixing. An up-converted microwave signal is obtained and other unwanted frequency components are suppressed at the end of the fiber span. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Microwave%20mixing" title="Microwave mixing">Microwave mixing</a>, <a href="https://publications.waset.org/search?q=bandpass%20filtering" title=" bandpass filtering"> bandpass filtering</a>, <a href="https://publications.waset.org/search?q=all-optical" title=" all-optical"> all-optical</a>, <a href="https://publications.waset.org/search?q=signal%20processing" title="signal processing">signal processing</a>, <a href="https://publications.waset.org/search?q=MZM." title=" MZM."> MZM.</a> </p> <a href="https://publications.waset.org/1599/numerical-analysis-of-all-optical-microwave-mixing-and-bandpass-filtering-in-an-rof-link" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/1599/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/1599/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/1599/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/1599/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/1599/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/1599/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/1599/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/1599/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/1599/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/1599/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/1599.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1719</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> New Triangle-Ring UWB Bandpass Filter with Sharp Roll-Off and Dual Notched Bands</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Hung-Wei%20Wu">Hung-Wei Wu</a>, <a href="https://publications.waset.org/search?q=Yung-Wei%20Chen"> Yung-Wei Chen</a>, <a href="https://publications.waset.org/search?q=Yu-Fu%20Chen"> Yu-Fu Chen</a>, <a href="https://publications.waset.org/search?q=Cheng-Yuan%20Hung"> Cheng-Yuan Hung</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper presents a new ultra-wideband (UWB) bandpass filter (BPF) with sharp roll-off and dual-notched bands. The filter consists of a triangle ring multi-mode resonator (MMR) with the stub-loaded resonator (SLR) for controlling the two transmission zeros at 2.8 / 11 GHz, the embedded open-circuited stub and the asymmetric tight coupled input/output (I/O) lines for introducing the dual notched bands at 5.2 / 6.8 GHz. The attenuation slope in the lower and higher passband edges of the proposed filter show 160- and 153-dB/GHz, respectively. This study mainly provides a simple method to design a UWB bandpass filter with high passband selectivity and dual-notched bands for satisfying the Federal Communications Commission (FCC-defined) indoor UWB specification</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=steeply%20slopes%20transition%20band" title="steeply slopes transition band">steeply slopes transition band</a>, <a href="https://publications.waset.org/search?q=bandpass%20filter" title=" bandpass filter"> bandpass filter</a>, <a href="https://publications.waset.org/search?q=ultra-wideband%20%28UWB%29" title=" ultra-wideband (UWB)"> ultra-wideband (UWB)</a>, <a href="https://publications.waset.org/search?q=triangle-ring" title=" triangle-ring"> triangle-ring</a>, <a href="https://publications.waset.org/search?q=multi-mode%20resonator" title=" multi-mode resonator"> multi-mode resonator</a>, <a href="https://publications.waset.org/search?q=stub-loaded%20resonator." title=" stub-loaded resonator."> stub-loaded resonator.</a> </p> <a href="https://publications.waset.org/6328/new-triangle-ring-uwb-bandpass-filter-with-sharp-roll-off-and-dual-notched-bands" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/6328/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/6328/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/6328/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/6328/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/6328/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/6328/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/6328/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/6328/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/6328/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/6328/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/6328.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2040</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> Symbolic Analysis of Input Impedance of CMOS Floating Active Inductors with Application in Fully Differential Bandpass Amplifier </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Kittipong%20Tripetch">Kittipong Tripetch</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper proposes a study of input impedance of 2 types of CMOS active inductors. It derives 2 input impedance formulas. The first formula is the input impedance of the grounded active inductor. The second formula is the input impedance of the floating active inductor. After that, these formulas can be used to simulate magnitude and phase response of input impedance as a function of current consumption with MATLAB. Common mode rejection ratio (CMRR) of the fully differential bandpass amplifier is derived based on superposition principle. CMRR as a function of input frequency is plotted as a function of current consumption. </p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Grounded%20active%20inductor" title="Grounded active inductor">Grounded active inductor</a>, <a href="https://publications.waset.org/search?q=floating%20active%20inductor" title=" floating active inductor"> floating active inductor</a>, <a href="https://publications.waset.org/search?q=Fully%20differential%20bandpass%20amplifier." title=" Fully differential bandpass amplifier. "> Fully differential bandpass amplifier. </a> </p> <a href="https://publications.waset.org/9996685/symbolic-analysis-of-input-impedance-of-cmos-floating-active-inductors-with-application-in-fully-differential-bandpass-amplifier" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9996685/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9996685/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9996685/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9996685/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9996685/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9996685/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/9996685/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/9996685/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/9996685/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/9996685/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/9996685.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1688</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> Motor Imaginary Signal Classification Using Adaptive Recursive Bandpass Filter and Adaptive Autoregressive Models for Brain Machine Interface Designs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Vickneswaran%20Jeyabalan">Vickneswaran Jeyabalan</a>, <a href="https://publications.waset.org/search?q=Andrews%20Samraj"> Andrews Samraj</a>, <a href="https://publications.waset.org/search?q=Loo%20Chu%20Kiong"> Loo Chu Kiong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>The noteworthy point in the advancement of Brain Machine Interface (BMI) research is the ability to accurately extract features of the brain signals and to classify them into targeted control action with the easiest procedures since the expected beneficiaries are of disabled. In this paper, a new feature extraction method using the combination of adaptive band pass filters and adaptive autoregressive (AAR) modelling is proposed and applied to the classification of right and left motor imagery signals extracted from the brain. The introduction of the adaptive bandpass filter improves the characterization process of the autocorrelation functions of the AAR models, as it enhances and strengthens the EEG signal, which is noisy and stochastic in nature. The experimental results on the Graz BCI data set have shown that by implementing the proposed feature extraction method, a LDA and SVM classifier outperforms other AAR approaches of the BCI 2003 competition in terms of the mutual information, the competition criterion, or misclassification rate.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Adaptive%20autoregressive" title="Adaptive autoregressive">Adaptive autoregressive</a>, <a href="https://publications.waset.org/search?q=adaptive%20bandpass%20filter" title=" adaptive bandpass filter"> adaptive bandpass filter</a>, <a href="https://publications.waset.org/search?q=brain%20machine%20Interface" title=" brain machine Interface"> brain machine Interface</a>, <a href="https://publications.waset.org/search?q=EEG" title=" EEG"> EEG</a>, <a href="https://publications.waset.org/search?q=motor%20imaginary." title=" motor imaginary."> motor imaginary.</a> </p> <a href="https://publications.waset.org/13088/motor-imaginary-signal-classification-using-adaptive-recursive-bandpass-filter-and-adaptive-autoregressive-models-for-brain-machine-interface-designs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/13088/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/13088/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/13088/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/13088/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/13088/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/13088/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/13088/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/13088/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/13088/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/13088/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/13088.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2901</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Compact Dual-Band Bandpass Filter Based on Quarter Wavelength Stepped Impedance Resonators</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Yu-Fu%20Chen">Yu-Fu Chen</a>, <a href="https://publications.waset.org/search?q=Zih-Jyun%20Dai"> Zih-Jyun Dai</a>, <a href="https://publications.waset.org/search?q=Chen-Te%20Chiu"> Chen-Te Chiu</a>, <a href="https://publications.waset.org/search?q=Shiue-Chen%20Chiou"> Shiue-Chen Chiou</a>, <a href="https://publications.waset.org/search?q=Yung-Wei%20Chen"> Yung-Wei Chen</a>, <a href="https://publications.waset.org/search?q=Yu-Ming%20Lin"> Yu-Ming Lin</a>, <a href="https://publications.waset.org/search?q=Kuan-Yu%20Chen"> Kuan-Yu Chen</a>, <a href="https://publications.waset.org/search?q=Hung-Wei%20Wu"> Hung-Wei Wu</a>, <a href="https://publications.waset.org/search?q=Hsin-Ying%20Lee"> Hsin-Ying Lee</a>, <a href="https://publications.waset.org/search?q=Yan-Kuin%20Su"> Yan-Kuin Su</a>, <a href="https://publications.waset.org/search?q=Shoou-Jinn%20Chang"> Shoou-Jinn Chang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper presents a compact dual-band bandpass filter that involves using the quarter wavelength stepped impedance resonators (SIRs) for achieving simultaneously compact circuit size and good dual-band performance. The filter is designed at 2.4 / 3.5 GHz and constructed by two pairs of quarter wavelength SIRs and source-load lines. By properly tuning the impedance ratio, length ratio and radius of via hole of the SIRs, dual-passbands performance can be easily determined. To improve the passband selectivity, the use of source-load lines is to increase coupling energy between the resonators. The filter is showing simple configuration, effective design method and small circuit size. The measured results are in good agreement with the simulation results.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Dual-band" title="Dual-band">Dual-band</a>, <a href="https://publications.waset.org/search?q=bandpass%20filter" title=" bandpass filter"> bandpass filter</a>, <a href="https://publications.waset.org/search?q=stepped%20impedance%20resonators" title=" stepped impedance resonators"> stepped impedance resonators</a>, <a href="https://publications.waset.org/search?q=SIR." title=" SIR."> SIR.</a> </p> <a href="https://publications.waset.org/10004208/compact-dual-band-bandpass-filter-based-on-quarter-wavelength-stepped-impedance-resonators" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10004208/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10004208/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10004208/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10004208/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10004208/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10004208/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10004208/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10004208/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10004208/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10004208/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10004208.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1929</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> The Excess Loop Delay Calibration in a Bandpass Continuous-Time Delta Sigma Modulators Based on Q-Enhanced LC Filter</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Sorore%20Benabid">Sorore Benabid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Q-enhanced LC filters are the most used architecture in the Bandpass (BP) Continuous-Time (CT) Delta-Sigma (ΣΔ) modulators, due to their: high frequencies operation, high linearity than the active filters and a high quality factor obtained by Q-enhanced technique. This technique consists of the use of a negative resistance that compensate the ohmic losses in the on-chip inductor. However, this technique introduces a zero in the filter transfer function which will affect the modulator performances in term of Dynamic Range (DR), stability and in-band noise (Signal-to-Noise Ratio (SNR)). In this paper, we study the effect of this zero and we demonstrate that a calibration of the excess loop delay (ELD) is required to ensure the best performances of the modulator. System level simulations are done for a 2ndorder BP CT (ΣΔ) modulator at a center frequency of 300MHz. Simulation results indicate that the optimal ELD should be reduced by 13% to achieve the maximum SNR and DR compared to the ideal LC-based ΣΔ modulator. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Continuous-time%20bandpass%20delta-sigma%20modulators" title="Continuous-time bandpass delta-sigma modulators">Continuous-time bandpass delta-sigma modulators</a>, <a href="https://publications.waset.org/search?q=excess%20loop%20delay" title=" excess loop delay"> excess loop delay</a>, <a href="https://publications.waset.org/search?q=on-chip%20inductor" title=" on-chip inductor"> on-chip inductor</a>, <a href="https://publications.waset.org/search?q=Q-enhanced%20LC%20filter." title=" Q-enhanced LC filter."> Q-enhanced LC filter.</a> </p> <a href="https://publications.waset.org/10008472/the-excess-loop-delay-calibration-in-a-bandpass-continuous-time-delta-sigma-modulators-based-on-q-enhanced-lc-filter" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10008472/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10008472/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10008472/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10008472/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10008472/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10008472/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10008472/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10008472/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10008472/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10008472/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10008472.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">761</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> A Low Noise Microwave Filter with Minimum Distortion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Cheng%20Yuan%20Hung">Cheng Yuan Hung</a>, <a href="https://publications.waset.org/search?q=Min%20Hang%20Weng"> Min Hang Weng</a>, <a href="https://publications.waset.org/search?q=Siang%20Wen%20Lan"> Siang Wen Lan</a>, <a href="https://publications.waset.org/search?q=Wei%20Yu%20Chen"> Wei Yu Chen</a>, <a href="https://publications.waset.org/search?q=Hung%20Wei%20Wu"> Hung Wei Wu</a>, <a href="https://publications.waset.org/search?q=Chun%20Yueh%20Huang"> Chun Yueh Huang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a low noise microwave bandpass filter (BPF) is presented. This filter is fabricated by modifying the conventional cross-coupled structure. The spurious response is improved by using the end open coupled lines, and the influence of the noise is minimized. Impedance matrix of the open end coupled circuit clarifies the characteristic of the suppression of the spurious response. The rejection of spurious suppression region of the proposed filter is greater than 20 dB from 3-13 GHz. The measured results of the fabricated filter confirm the concepts of the proposed design and exhibits high performance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Low%20noise" title="Low noise">Low noise</a>, <a href="https://publications.waset.org/search?q=signal%20transmission" title=" signal transmission"> signal transmission</a>, <a href="https://publications.waset.org/search?q=bandpass%20filter" title=" bandpass filter"> bandpass filter</a>, <a href="https://publications.waset.org/search?q=end%0Aopen%20coupled%20line" title=" end open coupled line"> end open coupled line</a>, <a href="https://publications.waset.org/search?q=communication%20system." title=" communication system."> communication system.</a> </p> <a href="https://publications.waset.org/3835/a-low-noise-microwave-filter-with-minimum-distortion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/3835/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/3835/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/3835/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/3835/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/3835/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/3835/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/3835/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/3835/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/3835/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/3835/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/3835.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1621</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Design and Synthesis of Two Tunable Bandpass Filters Based On Varactors and Defected Ground Structure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=M.%20Boulakroune">M. Boulakroune</a>, <a href="https://publications.waset.org/search?q=M.%20Challal"> M. Challal</a>, <a href="https://publications.waset.org/search?q=H.%20Louazene"> H. Louazene</a>, <a href="https://publications.waset.org/search?q=S.%20Fentiz"> S. Fentiz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper presents two types of microstrip bandpass filter (BPF) at microwave frequencies. The first one is a tunable BPF using planar patch resonators based on a varactor diode. The filter is formed by a triple mode circular patch resonator with two pairs of slots, in which the varactor diodes are connected. Indeed, this filter is initially centered at 2.4 GHz; the center frequency of the tunable patch filter could be tuned up to 1.8 GHz simultaneously with the bandwidth, reaching high tuning ranges. Lossless simulations were compared to those considering the substrate dielectric, conductor losses and the equivalent electrical circuit model of the tuning element in order to assess their effects. Within these variations, simulation results showed insertion loss better than 2 dB and return loss better than 10 dB over the passband. The second structure is a BPF for ultra-wideband (UWB) applications based on multiple-mode resonator (MMR) and rectangular-shaped defected ground structure (DGS). This filter, which is compact size of 25.2 x 3.8 mm2, provides in the pass band an insertion loss of 0.57 dB and a return loss greater than 12 dB. The proposed filters presents good performances and the simulation results are in satisfactory agreement with the experimentation ones reported elsewhere.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Defected%20ground%20structure" title="Defected ground structure">Defected ground structure</a>, <a href="https://publications.waset.org/search?q=varactor%20diode" title=" varactor diode"> varactor diode</a>, <a href="https://publications.waset.org/search?q=microstrip%0D%0Abandpass%20filter" title=" microstrip bandpass filter"> microstrip bandpass filter</a>, <a href="https://publications.waset.org/search?q=multiple-mode%20resonator." title=" multiple-mode resonator."> multiple-mode resonator.</a> </p> <a href="https://publications.waset.org/10000735/design-and-synthesis-of-two-tunable-bandpass-filters-based-on-varactors-and-defected-ground-structure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10000735/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10000735/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10000735/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10000735/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10000735/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10000735/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10000735/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10000735/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10000735/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10000735/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10000735.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2646</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Extraction of Fetal Heart Rate and Fetal Heart Rate Variability from Mother's ECG Signal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Khaldon%20Lweesy">Khaldon Lweesy</a>, <a href="https://publications.waset.org/search?q=Luay%20Fraiwan"> Luay Fraiwan</a>, <a href="https://publications.waset.org/search?q=Christoph%20Maier"> Christoph Maier</a>, <a href="https://publications.waset.org/search?q=Hartmut%20Dickhaus"> Hartmut Dickhaus</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This paper describes a new method for extracting the fetal heart rate (fHR) and the fetal heart rate variability (fHRV) signal non-invasively using abdominal maternal electrocardiogram (mECG) recordings. The extraction is based on the fundamental frequency (Fourier-s) theorem. The fundamental frequency of the mother-s electrocardiogram signal (fo-m) is calculated directly from the abdominal signal. The heart rate of the fetus is usually higher than that of the mother; as a result, the fundamental frequency of the fetal-s electrocardiogram signal (fo-f) is higher than that of the mother-s (fo-f > fo-m). Notch filters to suppress mother-s higher harmonics were designed; then a bandpass filter to target fo-f and reject fo-m is implemented. Although the bandpass filter will pass some other frequencies (harmonics), we have shown in this study that those harmonics are actually carried on fo-f, and thus have no impact on the evaluation of the beat-to-beat changes (RR intervals). The oscillations of the time-domain extracted signal represent the RR intervals. We have also shown in this study that zero-to-zero evaluation of the periods is more accurate than the peak-to-peak evaluation. This method is evaluated both on simulated signals and on different abdominal recordings obtained at different gestational ages.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Aabdominal%20ECG" title="Aabdominal ECG">Aabdominal ECG</a>, <a href="https://publications.waset.org/search?q=fetal%20heart%20rate%20variability" title=" fetal heart rate variability"> fetal heart rate variability</a>, <a href="https://publications.waset.org/search?q=frequency%20harmonics" title=" frequency harmonics"> frequency harmonics</a>, <a href="https://publications.waset.org/search?q=fundamental%20frequency." title=" fundamental frequency."> fundamental frequency.</a> </p> <a href="https://publications.waset.org/14006/extraction-of-fetal-heart-rate-and-fetal-heart-rate-variability-from-mothers-ecg-signal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/14006/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/14006/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/14006/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/14006/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/14006/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/14006/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/14006/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/14006/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/14006/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/14006/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/14006.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2673</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Meandered Microstrip Open Circuited Stub with Bandstop Characteristic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Goh%20Chin%20Hock">Goh Chin Hock</a>, <a href="https://publications.waset.org/search?q=Chandan%20Kumar%20Chakrabarty"> Chandan Kumar Chakrabarty</a>, <a href="https://publications.waset.org/search?q=Mohammad%20Hadi%20Badjian"> Mohammad Hadi Badjian</a>, <a href="https://publications.waset.org/search?q=Sanjay%20Devkumar"> Sanjay Devkumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a microstrip meandered open circuited stub with bandstop characteristic. The proposed structure is designed on a high frequency laminate with dielectric constant of 4.0 and board thickness of 0.508 millimeters. The scattering parameters and electromagnetic field distributions at various frequencies are investigated by modeling the structure with three dimensional electromagnetic simulation tool. In order to describe the resonant and bandstop characteristic of the meandered open circuited stub, a Smith chart as well as electric field at various frequencies and phases is illustrated accordingly. The structure can be an alternative method in suppressing the harmonic response of a bandpass filter. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Bandstop" title="Bandstop">Bandstop</a>, <a href="https://publications.waset.org/search?q=Equivalent%20Lumped%20Element%20Model" title=" Equivalent Lumped Element Model"> Equivalent Lumped Element Model</a>, <a href="https://publications.waset.org/search?q=Electromagnetic%20Model" title="Electromagnetic Model">Electromagnetic Model</a>, <a href="https://publications.waset.org/search?q=Meandered%20Open%20Circuited%20Stub" title=" Meandered Open Circuited Stub"> Meandered Open Circuited Stub</a> </p> <a href="https://publications.waset.org/9514/meandered-microstrip-open-circuited-stub-with-bandstop-characteristic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/9514/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/9514/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/9514/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/9514/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/9514/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/9514/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/9514/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/9514/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/9514/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/9514/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/9514.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2103</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Resistor-less Current-mode Universal Biquad Filter Using CCTAs and Grounded Capacitors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=T.%20Thosdeekoraphat">T. Thosdeekoraphat</a>, <a href="https://publications.waset.org/search?q=S.%20Summart"> S. Summart</a>, <a href="https://publications.waset.org/search?q=C.%20Saetiaw"> C. Saetiaw</a>, <a href="https://publications.waset.org/search?q=S.%20Santalunai"> S. Santalunai</a>, <a href="https://publications.waset.org/search?q=C.%20Thongsopa"> C. Thongsopa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This article presents a current-mode universal biquadratic filter. The proposed circuit can apparently provide standard functions of the biquad filter: low-pass, high-pass, bandpass, band-reject and all-pass functions. The circuit uses 4 current controlled transconductance amplifiers (CCTAs) and 2 grounded capacitors. In addition, the pole frequency and quality factor can be adjusted by electronic method by adjusting the bias currents of the CCTA. The proposed circuit uses only grounded capacitors without additional external resistors, the proposed circuit is considerably appropriate to further developing into an integrated circuit. The results of PSPICE simulation program are corresponding to the theoretical analysis.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Resistor-less" title="Resistor-less">Resistor-less</a>, <a href="https://publications.waset.org/search?q=Current-mode" title=" Current-mode"> Current-mode</a>, <a href="https://publications.waset.org/search?q=Biquad%20filter" title=" Biquad filter"> Biquad filter</a>, <a href="https://publications.waset.org/search?q=CCTA." title=" CCTA."> CCTA.</a> </p> <a href="https://publications.waset.org/8973/resistor-less-current-mode-universal-biquad-filter-using-cctas-and-grounded-capacitors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/8973/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/8973/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/8973/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/8973/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/8973/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/8973/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/8973/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/8973/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/8973/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/8973/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/8973.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2062</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Enhanced Performance of Fading Dispersive Channel Using Dynamic Frequency Hopping(DFH)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Walid%20M.%20Saad">Walid M. Saad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> techniques are examined to overcome the performance degradation caused by the channel dispersion using slow frequency hopping (SFH) with dynamic frequency hopping (DFH) pattern adaptation. In DFH systems, the frequency slots are selected by continuous quality monitoring of all frequencies available in a system and modification of hopping patterns for each individual link based on replacing slots which its signal to interference ratio (SIR) measurement is below a required threshold. Simulation results will show the improvements in BER obtained by DFH in comparison with matched frequency hopping (MFH), random frequency hopping (RFH) and multi-carrier code division multiple access (MC-CDMA) in multipath slowly fading dispersive channels using a generalized bandpass two-path transfer function model, and will show the improvement obtained according to the threshold selection. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=code%20division%20multiple%20access%20%28CDMA%29" title="code division multiple access (CDMA)">code division multiple access (CDMA)</a>, <a href="https://publications.waset.org/search?q=dynamic%0Achannel%20allocation%20%28DCA%29" title=" dynamic channel allocation (DCA)"> dynamic channel allocation (DCA)</a>, <a href="https://publications.waset.org/search?q=dynamic%20channel%20assignment" title=" dynamic channel assignment"> dynamic channel assignment</a>, <a href="https://publications.waset.org/search?q=frequency%0Ahopping" title=" frequency hopping"> frequency hopping</a>, <a href="https://publications.waset.org/search?q=matched%20frequency%20hopping%20%28MFH%29." title=" matched frequency hopping (MFH)."> matched frequency hopping (MFH).</a> </p> <a href="https://publications.waset.org/5886/enhanced-performance-of-fading-dispersive-channel-using-dynamic-frequency-hoppingdfh" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/5886/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/5886/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/5886/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/5886/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/5886/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/5886/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/5886/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/5886/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/5886/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/5886/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/5886.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1711</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Efficient Feature-Based Registration for CT-M R Images Based on NSCT and PSO</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Nemir%20Al-Azzawi">Nemir Al-Azzawi</a>, <a href="https://publications.waset.org/search?q=Harsa%20A.%20Mat%20Sakim"> Harsa A. Mat Sakim</a>, <a href="https://publications.waset.org/search?q=Wan%20Ahmed%20K.%20Wan%20Abdullah"> Wan Ahmed K. Wan Abdullah</a>, <a href="https://publications.waset.org/search?q=Yasmin%20Mohd%20Yacob"> Yasmin Mohd Yacob</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>Feature-based registration is an effective technique for clinical use, because it can greatly reduce computational costs. However, this technique, which estimates the transformation by using feature points extracted from two images, may cause misalignments. To handle with this limitation, we propose to extract the salient edges and extracted control points (CP) of medical images by using efficiency of multiresolution representation of data nonsubsampled contourlet transform (NSCT) that finds the best feature points. The MR images were first decomposed using the NSCT, and then Edge and CP were extracted from bandpass directional subband of NSCT coefficients and some proposed rules. After edge and CP extraction, mutual information was adopted for the registration of feature points and translation parameters are calculated by using particle swarm optimization (PSO). The experimental results showed that the proposed method produces totally accurate performance for registration medical CT-MR images.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Feature-based%20registration" title="Feature-based registration">Feature-based registration</a>, <a href="https://publications.waset.org/search?q=mutual%20information" title=" mutual information"> mutual information</a>, <a href="https://publications.waset.org/search?q=nonsubsampled%20contourlet%20transform" title=" nonsubsampled contourlet transform"> nonsubsampled contourlet transform</a>, <a href="https://publications.waset.org/search?q=particle%20swarm%20optimization." title=" particle swarm optimization."> particle swarm optimization.</a> </p> <a href="https://publications.waset.org/12542/efficient-feature-based-registration-for-ct-m-r-images-based-on-nsct-and-pso" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/12542/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/12542/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/12542/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/12542/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/12542/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/12542/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/12542/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/12542/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/12542/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/12542/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/12542.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1970</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> A Compact Via-less Ultra-Wideband Microstrip Filter by Utilizing Open-Circuit Quarter Wavelength Stubs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Muhammad%20Yasir%20Wadood">Muhammad Yasir Wadood</a>, <a href="https://publications.waset.org/search?q=Fatemeh%20Babaeian"> Fatemeh Babaeian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>By developing ultra-wideband (UWB) systems, there is a high demand for UWB filters with low insertion loss, wide bandwidth, and having a planar structure which is compatible with other components of the UWB system. A microstrip interdigital filter is a great option for designing UWB filters. However, the presence of via holes in this structure creates difficulties in the fabrication procedure of the filter. Especially in the higher frequency band, any misalignment of the drilled via hole with the Microstrip stubs causes large errors in the measurement results compared to the desired results. Moreover, in this case (high-frequency designs), the line width of the stubs are very narrow, so highly precise small via holes are required to be implemented, which increases the cost of fabrication significantly. Also, in this case, there is a risk of having fabrication errors. To combat this issue, in this paper, a via-less UWB microstrip filter is proposed which is designed based on a modification of a conventional inter-digital bandpass filter. The novel approaches in this filter design are 1) replacement of each via hole with a quarter-wavelength open circuit stub to avoid the complexity of manufacturing, 2) using a bend structure to reduce the unwanted coupling effects and 3) minimising the size. Using the proposed structure, a UWB filter operating in the frequency band of 3.9-6.6 GHz (1-dB bandwidth) is designed and fabricated. The promising results of the simulation and measurement are presented in this paper. The selected substrate for these designs was Rogers RO4003 with a thickness of 20 mils. This is a common substrate in most of the industrial projects. The compact size of the proposed filter is highly beneficial for applications which require a very miniature size of hardware.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Band-pass%20filters" title="Band-pass filters">Band-pass filters</a>, <a href="https://publications.waset.org/search?q=inter-digital%20filter" title=" inter-digital filter"> inter-digital filter</a>, <a href="https://publications.waset.org/search?q=microstrip" title=" microstrip"> microstrip</a>, <a href="https://publications.waset.org/search?q=via-less." title=" via-less."> via-less.</a> </p> <a href="https://publications.waset.org/10010191/a-compact-via-less-ultra-wideband-microstrip-filter-by-utilizing-open-circuit-quarter-wavelength-stubs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10010191/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a 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btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10010191/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10010191.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">834</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul 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