Wideband high-isolation and perfect-balance microstrip rat-race coupler

W. S. Chang*, C. H. Liang, Chi-Yang Chang

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations


A microstrip rat-race coupler with high isolation and perfect balance is presented. By modifying March's rat-race coupler with two additional short-circuited stubs, the isolation and the amplitude/phase balance of the proposed coupler improve significantly. The circuit can be easily fabricated on a single-layer substrate using the conventional printed circuit board process.

Original languageEnglish
Pages (from-to)382-384
Number of pages3
JournalElectronics Letters
Issue number7
StatePublished - 29 Mar 2012

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