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Characterization of a slotted circular patch resonator for adjustable dual-mode dual-band bandpass filters
Zhang R.1; Zhu L.1; Luo S.2
2012-10-03
Source PublicationIEEE MTT-S International Microwave Symposium Digest
AbstractA slotted circular patch resonator is proposed to design a dual-mode dual-band bandpass filter in this work. Three sets of slots are etched into a circular patch. First, four arc-oriented slots are etched to lower the TM mode resonant frequency. Then, four radial-oriented slots are etched from the edge of the circular patch to bring down the resonant frequency of the TM mode. By changing these two sets of slots, the TM and TM resonant modes are adjusted to make up the second dual-pole passband. Next, a slot is etched into the center of the circular patch to split the pair of TM degenerate modes, which forms the first dual-mode passband. Two high impedance transmission lines are connected to the resonator at a 90° angle along the patch. To increase the out-of-band rejection, two more transmission zeros are introduced by cross-coupling between the input and output feed lines. Two prototype dual-band filters are designed with different frequency ratios so as to verify the design principle. The measured results agree well with the simulated ones. © 2012 IEEE.
KeywordCircular patch resonator Degenerate modes and high-order modes Dual-mode dual-band bandpass filter Slots
DOI10.1109/MWSYM.2012.6258268
URLView the original
Language英語
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Citation statistics
Document TypeConference paper
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Nanyang Technological University
2.National University of Singapore
Recommended Citation
GB/T 7714
Zhang R.,Zhu L.,Luo S.. Characterization of a slotted circular patch resonator for adjustable dual-mode dual-band bandpass filters[C],2012.
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