Search results for: Damera Vakula

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Vakula</title> <meta name="description" content="Search results for: Damera Vakula"> <meta name="keywords" content="Damera Vakula"> <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 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Damera Vakula"> <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> 4</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Damera Vakula</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> 3-D Printed Step Shaped MIMO Patch Antenna Design for Wireless Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manasa%20Chinnam">Manasa Chinnam</a>, <a href="https://publications.waset.org/abstracts/search?q=Damera%20Vakula"> Damera Vakula</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20V.%20S.%20N.%20Sarma"> N. V. S. N. Sarma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A three-dimensional step-shaped MIMO antenna with reduced mutual coupling between antenna components and the ability to operate at multiple bands is presented. The proposed antenna consists of two separate radiating components; each part is designed to provide a considerable degree of isolation between the radiators. The MIMO antenna measures 36×84 mm2. Furthermore, a flexible PLA substrate that is 2 mm thick is designed for the MIMO antenna. The study's most significant finding is that low isolation (below 30dB) can be achieved throughout the whole operating range. This is operated at 6.3 GHz with an approximate radiation efficiency of 94% and a peak gain of 7.9 dB and can attain an Envelope Correlation Coefficient (ECC) of less than 0.0015. The proposed antenna is a good candidate for wireless application since the designed antenna achieves a notable improvement in isolation, radiation performance in the intended band of operation without the need for a decoupling mechanism. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=multi-input%20multi%20output" title="multi-input multi output">multi-input multi output</a>, <a href="https://publications.waset.org/abstracts/search?q=envelope%20correlation%20coefficient" title=" envelope correlation coefficient"> envelope correlation coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=3-D%20printing" title=" 3-D printing"> 3-D printing</a>, <a href="https://publications.waset.org/abstracts/search?q=step%20shape" title=" step shape"> step shape</a>, <a href="https://publications.waset.org/abstracts/search?q=polylactic%20acid" title=" polylactic acid"> polylactic acid</a> </p> <a href="https://publications.waset.org/abstracts/195598/3-d-printed-step-shaped-mimo-patch-antenna-design-for-wireless-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/195598.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">11</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Dual-Band Microwave Metamaterial Absorber Using Modified Circular Ring Resonator for Sensor Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ramesh%20Amugothu">Ramesh Amugothu</a>, <a href="https://publications.waset.org/abstracts/search?q=Vakula%20Damera"> Vakula Damera</a>, <a href="https://publications.waset.org/abstracts/search?q=Narasimha%20Sarma%20N.%20V.%20S."> Narasimha Sarma N. V. S.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents a dual-band metamaterial microwave absorber that functions at frequencies of 3.5 GHz and 5.7 GHz. The design comprises modified ring and rectangular patch resonators fabricated on an FR4 dielectric substrate with a ground layer beneath it, emphasizing simplicity. Each absorption frequency is independent and can be individually adjusted by altering the dimensions of the respective resonator structures. The unit cell of the absorber is simulated and optimized parametrically using high-frequency structure simulator (HFSS) software. The mechanism behind the absorption is examined through surface current analysis as well as the symmetric model method. The absorber demonstrates over 97% absorption at both resonant frequencies and is shown to be suitable for sensing applications related to dielectric constant measurement. With its straightforward design, wide-angle acceptance, and polarization-insensitive characteristics, the proposed absorber is likely to be beneficial for both absorption and sensing purposes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=absorption" title="absorption">absorption</a>, <a href="https://publications.waset.org/abstracts/search?q=dielectric%20permittivity" title=" dielectric permittivity"> dielectric permittivity</a>, <a href="https://publications.waset.org/abstracts/search?q=metamaterials" title=" metamaterials"> metamaterials</a>, <a href="https://publications.waset.org/abstracts/search?q=metasurfaces" title=" metasurfaces"> metasurfaces</a>, <a href="https://publications.waset.org/abstracts/search?q=resonant%20structures" title=" resonant structures"> resonant structures</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor%20devices" title=" sensor devices"> sensor devices</a> </p> <a href="https://publications.waset.org/abstracts/195602/dual-band-microwave-metamaterial-absorber-using-modified-circular-ring-resonator-for-sensor-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/195602.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">12</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Performance Improvement of UWB Corrugated Antipodal Vivaldi Antenna Using Spiral Shape Negative Index Metamaterial</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rahul%20Singha">Rahul Singha</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Vakula"> D. Vakula</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a corrugated antipodal vivaldi antenna with improved performance by using negative index metamaterial (NIM) of the Archimedean spiral design. A single layer NIM piece is placed perpendicular middle of the two arm of the proposed antenna. The antenna size is 30×60×0.787 mm3 operating at 8GHz. The simulated results of NIM corrugated antipodal vivaldi antenna show that the gain and directivity has increased up to 1.2dB and 1dB respectively. The HPBW is increased by 90 with the reﬂection coeﬃcient less than ‒10 dB from 4.7 GHz to 11 GHz for UWB application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Negative%20Index%20Metamaterial%20%28NIM%29" title="Negative Index Metamaterial (NIM)">Negative Index Metamaterial (NIM)</a>, <a href="https://publications.waset.org/abstracts/search?q=Ultra%20Wide%20Band%20%28UWB%29" title=" Ultra Wide Band (UWB)"> Ultra Wide Band (UWB)</a>, <a href="https://publications.waset.org/abstracts/search?q=Half%20Power%20Beam%20Width%20%28HPBW%29" title=" Half Power Beam Width (HPBW)"> Half Power Beam Width (HPBW)</a>, <a href="https://publications.waset.org/abstracts/search?q=vivaldi%20antenna" title=" vivaldi antenna"> vivaldi antenna</a> </p> <a href="https://publications.waset.org/abstracts/15963/performance-improvement-of-uwb-corrugated-antipodal-vivaldi-antenna-using-spiral-shape-negative-index-metamaterial" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15963.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">625</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Multiband Multipolarized Planar Antenna for WLAN/WiMAX Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sanjeeva%20Reddy">Sanjeeva Reddy</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Vakula"> D. Vakula</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A single layer, multi-band triangular patch antenna is proposed for WLAN/WiMAX applications with different polarization requirements. This probe feed patch is integrated with arc shaped slit to achieve circular polarized (CP) and linearly polarized (LP) radiation characteristics. The main contribution of antenna is to resonate the frequencies of 2.4 GHz with CP and 3.5 GHz, 5.28 GHz with LP. The design procedure of antenna is described and the performance is validated using measurements. Size of antenna is also reduced and provides stable gain at all resonant frequencies. Proposed structure also provides better enhancement in terms of 10-dB impedance bandwidth, achieved gain of 5.1, 5.6, and 2.9 dBi at respective bands. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=circular%20polarization" title="circular polarization">circular polarization</a>, <a href="https://publications.waset.org/abstracts/search?q=arc%20shaped%20slit" title=" arc shaped slit"> arc shaped slit</a>, <a href="https://publications.waset.org/abstracts/search?q=multi%20band%20antenna" title=" multi band antenna"> multi band antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=triangular%20patch%20antenna" title=" triangular patch antenna"> triangular patch antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=axial%20ratio" title=" axial ratio"> axial ratio</a> </p> <a href="https://publications.waset.org/abstracts/16044/multiband-multipolarized-planar-antenna-for-wlanwimax-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16044.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">398</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 class="list-unstyled"> Account <li><a href="https://waset.org/profile">My Account</a></li> </ul> </div> <div 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Search results for: Damera Vakula