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Compact triple-band bandpass filter using multi-mode HMSIW cavity and half-mode DGS

Published online by Cambridge University Press:  22 July 2020

Sambaiah Pelluri Open the ORCID record for Sambaiah Pelluri [Opens in a new window]  and
M. V. Kartikeyan Open the ORCID record for M. V. Kartikeyan [Opens in a new window]
Sambaiah Pelluri*
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee247667, India; Department of Electronics and Communication Engineering, Vignan's Foundation for Science, Technology and Research, Vadlamudi522213, India
M. V. Kartikeyan
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee247667, India;
*
Author for correspondence: Sambaiah Pelluri, E-mail: sambaiah439@gmail.com
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Abstract

In this paper, a triple-band bandpass filter using a multi-mode half-mode substrate integrated waveguide (HMSIW) cavity is presented. In this design, back-to-back connected half-mode defected ground structure (DGS) is loaded into the HMSIW cavity, which generates the first passband. The first four modes of HMSIW cavity are TM110, TM120, TM310, and TM320. They have been used to generate second and third passbands. The slot line perturbation is used to shift the modes close to each other. Here, TM110 and TM120 constitute second passband, and TM310 and TM320 give third passband. Moreover, the notch band is designed using embedded open-circuited stub to improve the attenuation between the second and third passbands. The proposed filter is designed and fabricated on RT/Duroid 5880 substrate with a thickness of 0.508 mm. The measured results are in line with simulated ones for each of the passbands, and the center frequencies are 6.28, 13, and 19.12 GHz.

Keywords

Triple-band bandpass filtermulti-mode half-mode substrate integrated waveguide cavityhalf-mode defected ground structurenotch band
Type
Filters
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 2 , March 2021 , pp. 103 - 110
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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