Mixed coupled quarter-wavelength resonator filter utilizing J/K inverters and coupling-path phases

Muhammad Sufian Anwar, Hamza Nawaz, Arslan Kiyani, Muhammad Ali Babar Abbasi

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

Abstract

This paper presents a compact mixed coupled quarter-wavelength (\lambda/4) resonator filter employing J/K inverters and coupling-path phases. In contrast to conventional mixed coupled models, the proposed method makes use of separated J and K inverters to obtain desired electric and magnetic couplings respectively. A transmission zero (TZ) below passband is created by applying capacitive dominant mixed coupling between \lambda/4 uniform impedance resonators (UIRs). In addition to coupling magnitude, the TZ also depends on coupling path phases. Tapped feed lines implied between resonators and input-output (I/O) ports provide necessary electrical length ratio between J and K coupling paths. A fourth order prototype filter at 10GHZ with 6.8% fractional bandwidth (FBW) is designed, fabricated and tested. The measured results show good agreement with simulated response, which verifies the design approach.

Original languageEnglish
Title of host publication2020 International Conference on UK-China Emerging Technologies (UCET)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-3
Number of pages3
ISBN (Electronic)9781728194882
ISBN (Print)9781728194899
DOIs
Publication statusPublished - 2020
Event2020 International Conference on UK-China Emerging Technologies, UCET 2020 - Glasgow, United Kingdom
Duration: 20 Aug 202021 Aug 2020

Conference

Conference2020 International Conference on UK-China Emerging Technologies, UCET 2020
CountryUnited Kingdom
CityGlasgow
Period20/08/2021/08/20

Keywords

  • Bandpass Filter
  • Mixed-coupled
  • Transmission Zero
  • Quarter-wavelength Resonator
  • J-inverter
  • K-inverter

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