Please use this identifier to cite or link to this item: 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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