A reconfigurable quarter-mode substrate integrated waveguide cavity filter employing liquid-metal capacitive loading

Alireza Pourghorban Saghati, Sina Baghbani Kordmahale, Jun Kameoka, Kamran Entesari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

A microfluidically-tunable substrate integrated cavity filter is presented for the first time. Quarter mode cylindrical substrate integrated waveguide (SIW) cavities are used to design an ultra-compact two-pole filter with a center frequency of ∼1.12 GHz. A corner via is connected to a surface ring gap in order to capacitively load each SIW cavity resonator. Frequency tuning of the filter is achieved using the capacitive loading effect of a liquid metal channel placed on top of the surface gap capacitors. The Polydimethylsiloxane (PDMS) structure including the micro-channel is bonded to the SIW circuit board using a unique fabrication technique. Measured results verify a tuning ratio of 1.72:1 and an insertion loss of 2.5 and 3.45 dB at 1.12 and 0.65 GHz, respectively.

Original languageEnglish
Title of host publication2015 IEEE MTT-S International Microwave Symposium, IMS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479982752
DOIs
Publication statusPublished - 2015 Jul 24
Externally publishedYes
EventIEEE MTT-S International Microwave Symposium, IMS 2015 - Phoenix, United States
Duration: 2015 May 172015 May 22

Publication series

Name2015 IEEE MTT-S International Microwave Symposium, IMS 2015

Other

OtherIEEE MTT-S International Microwave Symposium, IMS 2015
Country/TerritoryUnited States
CityPhoenix
Period15/5/1715/5/22

Keywords

  • Filters
  • microfluidics
  • reconfigurable filter
  • resonators
  • substrate integrated waveguide (SIW)
  • tunable filter

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Electrical and Electronic Engineering

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