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Inline and canonical stripline filters with ridge coupling sections for LTCC applications
Author(s) -
Zhang Yunchi,
RuizCruz Jorge A.,
Zaki Kawthar A.
Publication year - 2009
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20356
Subject(s) - chebyshev filter , stripline , waveguide filter , resonator , electronic engineering , filter (signal processing) , network synthesis filters , prototype filter , elliptic filter , microwave , engineering , topology (electrical circuits) , electrical engineering , filter design , telecommunications
Inline and canonical filters employing stripline resonators coupled by evanescent‐mode ridge waveguide sections are presented. The proposed configurations are suitable choices for broadband chip filters integrated in printed circuit boards, especially for those with constraints on size and loss. Low temperature co‐fired ceramic (LTCC) technology can be used to manufacture such filters. To validate the idea, prototypes of Chebyshev and elliptic function filters are designed following a systematic procedure. Stepped impedance stripline resonators are used in the Chebyshev filter to improve the spurious response. A novel canonical structure is presented for achieving high selectivity elliptic function filter responses. Rigorous mode matching method is applied to analyze and optimize all the filters, whose results are validated by commercial software. © 2008 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.