Single- and Dual-Band Bandpass Filters Using a Single Perturbed SIW Circular Cavity

In this letter, single- and dual-band bandpass filters using a single perturbed substrate integrated waveguide (SIW) circular cavity are presented. The perturbed TM 010 , TM 110 (a pair of degenerate modes), and TM 210 resonant modes of the SIW circular cavity are used to design the proposed filters...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 29; no. 3; pp. 201 - 203
Main Authors Azad, Amit Ranjan, Mohan, Akhilesh
Format Journal Article
LanguageEnglish
Published IEEE 01.03.2019
Subjects
Band-pass filters
Bandpass filters
Cavity resonators
circular cavity
Dual band
Microwave filters
Passband
Perturbation methods
Resonant frequency
single-band
substrate integrated waveguide (SIW)
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Summary:In this letter, single- and dual-band bandpass filters using a single perturbed substrate integrated waveguide (SIW) circular cavity are presented. The perturbed TM 010 , TM 110 (a pair of degenerate modes), and TM 210 resonant modes of the SIW circular cavity are used to design the proposed filters. The metallic vias are used to perturb the resonant modes. In addition, slot perturbations are introduced to the cavity to independently tune the center frequencies (CFs) of the passbands. Moreover, desired CFs and bandwidths of the passbands can be obtained by adjusting the perturbation elements. The designed filters are fabricated and measured to validate the present approach.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2019.2893379