Isolation-improved branch-line coupler based on feed-forward technique

Byung Jun Ahn, Sang Kyu Kim, Jong Gwan Yook

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

5 Citations (Scopus)


In this paper, the improved feed-forward technique to enhance the isolation of a Tx/Rx is presented. It is particularly suitable for Tx/Rx antenna applications and also could be implemented in MMICs. It is achieved about -55 dB isolation after applying feed-forward technique to the branch-line coupler. The proposed feed-forward structure is implemented using the branch-line coupler, the coupled line and the Wilkinson combiner, especially consisted of only microstrip lines, without implementation of other devices like phase shifter and attenuator or application of multi-layer, at ISM band of 5.8 GHz.

Original languageEnglish
Title of host publicationAPMC 2005
Subtitle of host publicationAsia-Pacific Microwave Conference Proceedings 2005
Publication statusPublished - 2005
EventAPMC 2005: Asia-Pacific Microwave Conference 2005 - Suzhou, China
Duration: 2005 Dec 42005 Dec 7

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


OtherAPMC 2005: Asia-Pacific Microwave Conference 2005

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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