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Theory of Coupled Resonator Microwave Bandpass Filters of Arbitrary Bandwidth

Abstract : This paper presents a new approach to the design of canonical dual-mode cavity filters within representation theory. Instead of the folded canonical coupling matrix, which results from using the resonances of the empty cavities as a basis, a representation based on the resonances of the cavities with all perturbations present is used. The resulting coupling matrix takes the form of a cul-de-sac configuration. For canonical dual-mode filters with a symmetric response, it allows direct design of the entire structure, except of the input cavity that requires optimization. A sixth-order filter with two symmetrically located transmission zeros is presented to document the validity of the approach. A sixth-order filter with two transmission zeros above the passband is also presented.
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Contributor : Fabien Seyfert <>
Submitted on : Monday, January 20, 2020 - 9:30:31 AM
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Smain Amari, Fabien Seyfert, M. Bekheit. Theory of Coupled Resonator Microwave Bandpass Filters of Arbitrary Bandwidth. IEEE Transactions on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers, 2010, 58 (8), pp.2188 -2203. ⟨10.1109/TMTT.2010.2052874⟩. ⟨hal-00663513⟩



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