Millimeter-Wave Substrate-Integrated Waveguide Multiplexer with High Channel Scalability and High Isolation

Pei Ling Chi*, Po Hua Wang, Tao Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper proposes a millimeter-wave substrate-integrated waveguide (SIW) multiplexer with high channel scalability and high isolation. To allow flexible increase in the number of channels while reducing the loading effect, a common SIW that is short-circuited at the far end is used to load all channels at locations with maximum magnetic field intensity. Isolation between channels is further improved by staggering higher-order resonances of SIW cavities to suppress any harmonic passband and thus extends the capability of implementing arbitrary passband frequencies. As a proof-of-concept, a quadruplexer was fabricated with center frequencies at 27.1/28.6/37.6/39.3 GHz, where the measured minimum insertion loss is 3.9/3.8/3.6/3.9 dB and the in-band isolation is greater than 37 dB between any two channels. In the frequency range of 20-45 GHz, the measured isolation is greater than 32 dB.

Original languageEnglish
Title of host publication2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages623-626
Number of pages4
ISBN (Electronic)9798350347647
DOIs
StatePublished - 2023
Event2023 IEEE/MTT-S International Microwave Symposium, IMS 2023 - San Diego, United States
Duration: 11 Jun 202316 Jun 2023

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2023-June
ISSN (Print)0149-645X

Conference

Conference2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
Country/TerritoryUnited States
CitySan Diego
Period11/06/2316/06/23

Keywords

  • cavity
  • isolation
  • millimeter-wave
  • multiplexer
  • quadruplexer
  • scalability
  • substrate-integrated waveguide

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