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Compact branch-line coupler filter with transmission zeros

  • Tsu Wei Lin
  • , Chun Hung Lin
  • , Kai Chun Huang
  • , Jen Tsai Kuo
  • Chang Gung University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

23 Scopus citations

Abstract

A compact filtering branch-line coupler is developed with short-ended half-wave resonators. For input/ output matching, tapped-line feeds incorporate a skew-symmetric configuration with magnetic inter-resonator coupling, so that transmission zeros can be created on high side of the passbands in the coupled and through outputs, as well as the isolated port. Circuit analysis is conducted based on the transmission line theory for prediction of these zeros. Measured responses of an experimental circuit show good agreement with simulated results.

Original languageEnglish
Title of host publication2015 Asia-Pacific Microwave Conference Proceedings, APMC 2015
EditorsFan Meng, Wei Hong, Guang-Qi Yang, Zhe Song, Xiao-Wei Zhu
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479987658
DOIs
StatePublished - 2015
Event2015 Asia-Pacific Microwave Conference, APMC 2015 - Nanjing, China
Duration: 06 12 2015 → 09 12 2015

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
Volume3

Conference

Conference2015 Asia-Pacific Microwave Conference, APMC 2015
Country/TerritoryChina
CityNanjing
Period06/12/15 → 09/12/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

  • Bandpass filter
  • Branch-line coupler
  • Resonator
  • Skew-symmetric
  • Tapped-line feeds
  • transmission zero

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