A wide stopband multilayer substrate integrated waveguide bandpass filter with suppression of higher-order mode coupling

Cong Tang, Fei Cheng, Chao Gu

Research output: Contribution to journalArticlepeer-review


This paper presents a compact multilayer substrate integrated waveguide (SIW) bandpass filter with wide stopband. The square SIW cavity resonators in multilayer substrates are horizontally and vertically coupled with magnetic coupling. By properly designing the coupling structure, the couplings between the higher-order resonant modes can be suppressed. Compared with the conventional single-layer SIW filters, the proposed multilayer SIW filter also exhibits a compact size. To verify the design concept, a double-layered SIW filter is fabricated and measured. The measured results agree well with the simulations. The measured results show that the upper stopband of the filter is extended to 2.73 times of the center frequency 8.02 GHz.

Original languageEnglish
Number of pages8
JournalInternational Journal of Microwave and Wireless Technologies
Early online date02 Feb 2021
Publication statusEarly online date - 02 Feb 2021

Bibliographical note

Publisher Copyright:
© The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

Copyright 2021 Elsevier B.V., All rights reserved.


  • Filter
  • Stopband suppression
  • Substrate integrated waveguide
  • Wide stopband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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