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https://hdl.handle.net/11499/10771
Title: | Electronically switchable compact quad-band microstrip bandpass filter using varactor perturbed dual-mode resonators | Authors: | Gorur, A.K. Karpuz, Ceyhun Gorur, A. |
Keywords: | bandpass filter dual-mode resonators (DMRs) Quad-band switchable varactor Bandpass filters Frequency response Microwave filters Resonators Scattering parameters Varactors Dual mode resonators Even- and odd-mode Microstrip band-pass filter Perturbation element Quad bands Resonance condition Switchable Switching operations Microstrip filters |
Publisher: | Taylor and Francis Ltd. | Abstract: | In this paper, an electronically switchable quad-band microstrip bandpass filter is designed using varactor perturbed dual-mode resonators. For this purpose, four meandered dual-mode square loop resonators (DMSLRs) having reference patches are nested and varactor diodes are used to serve as perturbation elements. The designed resonator is analyzed by deriving even/odd mode resonance conditions. S-parameters are also calculated according to the even and odd mode input impedances. Stub loaded feedlines are used to couple the DMSLRs to Input/Output (I/O) ports. According to the capacitances of varactor diodes, each passband can be independently turned on and off. Coupling scheme and coupling matrix of the designed filter are introduced to realize the coupling descriptions. Switching operations are also investigated over the frequency responses obtained from coupling matrix. Passbands of the filter are adjusted to 1.4, 1.7, 2.25, and 2.7 GHz. The designed filter was also fabricated and measured results show a good agreement with the simulated and theoretical results. © 2017 Informa UK Limited, trading as Taylor & Francis Group. | URI: | https://hdl.handle.net/11499/10771 https://doi.org/10.1080/09205071.2017.1414000 |
ISSN: | 0920-5071 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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