Practical Design and Implementation Method for Asymmetric-Response Post-Loaded Substrate-Integrated Waveguide Filters

Sanggu Lee, Seunggoo Nam, Juseop Lee

Research output: Contribution to journalArticle

Abstract

This paper presents a practical method for implementing a post-loaded substrate-integrated waveguide (SIW) filter producing an asymmetric response with a pair of near-band transmission zeros. More specifically, we present a practical frequency-dependent coupling structure for post-loaded SIW resonators for implementing an asymmetric response. By virtue of the proposed coupling design methods, the roll-offs in the upper and lower stopbands can be readily controlled to be different from each other. In other words, the roll-off in a stopband can be made to be steeper than the one in the other stopband by means of using the proposed design method for coupling structure. More importantly, we propose a useful approach to swap the two stopband responses of an asymmetric-response filter. In other word, this paper shows a practical method to laterally reverse an asymmetric response. For demonstration, 1 symmetric-response and 2 asymmetric-response fourth-order SIW filters have been designed using the presented frequency-dependent coupling structures.

Original languageEnglish
Article number9103560
Pages (from-to)101528-101538
Number of pages11
JournalIEEE Access
Volume8
DOIs
Publication statusPublished - 2020

Keywords

  • Coupling
  • filter
  • resonator
  • substrate-integrated waveguide

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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