Compact QMSIW quasi-elliptic filter based on a novel electric coupling structure

A compact quarter-mode substrate integrated waveguide (QMSIW) quasi-elliptical bandpass filter is presented based on a novel interdigital-like capacitive coupling structure. This type of electric coupling structure is very suitable for the open boundary to implement the cross-coupling in classical q...

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Bibliographic Details
Published in:Electronics letters 2017-11, Vol.53 (23), p.1528-1530
Main Authors: Shi, Yanjia, Zhou, Kang, Zhou, Chunxia, Wu, Wen
Format: Article
Language:English
Subjects:
band‐pass filters
compact QMSIW quasielliptic filter
compact quarter‐mode substrate integrated waveguide
electric coupling structure
electric walls
elliptic filters
frequency 5 GHz
interdigital‐like capacitive coupling structure
microwave filters
Microwave technology
quadruple topology
quasielliptical bandpass filter
spurious resonance
substrate integrated waveguides
waveguide filters
wide‐stopband feature
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Summary:A compact quarter-mode substrate integrated waveguide (QMSIW) quasi-elliptical bandpass filter is presented based on a novel interdigital-like capacitive coupling structure. This type of electric coupling structure is very suitable for the open boundary to implement the cross-coupling in classical quadruple topology. By this characteristic, a QMSIW quasi-elliptical filter working at 5 GHz is designed to demonstrate the superiority of this structure to the electric walls. Benefitting from the QMSIW technology, the wide-stopband feature is intrinsically achieved for the filter and the first spurious resonance is occurred at around two times the centre frequency.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2017.3367