<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/10011105" mdate="2020-02-04 00:00:00"> <author>Muhammad Haitham Albahnassi and Adnan Malki and Shokri Almekdad</author> <title>Improving the Frequency Response of a Circular DualMode Resonator with a Reconfigurable Bandwidth</title> <pages>59 - 62</pages> <year>2020</year> <volume>14</volume> <number>3</number> <journal>International Journal of Electronics and Communication Engineering</journal> <ee>https://publications.waset.org/pdf/10011105</ee> <url>https://publications.waset.org/vol/159</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>In this paper, a method for reconfiguring bandwidth in a circular dualmode resonator is presented. The method concerns the optimized geometry of a structure that may be used to host the tuning elements, which are typically RF (Radio Frequency) switches. The tuning elements themselves, and their performance during tuning, are not the focus of this paper. The designed resonator is able to reconfigure its fractional bandwidth by adjusting the intercoupling level between the degenerate modes, while at the same time improving its response by adjusting the externalcoupling level and keeping the center frequency fixed. The intercoupling level has been adjusted by changing the dimensions of the perturbation element, while the externalcoupling level has been adjusted by changing one of the feeder dimensions. The design was arrived at via optimization. Agreeing simulation and measurement results of the designed and implemented filters showed good improvements in return loss values and the stability of the center frequency.</abstract> <index>Open Science Index 159, 2020</index> </article>