Slow-Wave Broadside-Coupled Microstrip Lines and Its Application to the Rat-Race Coupler

Wei Shin Chang, Cheng Hsien Liang, Chi-Yang Chang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

This letter proposes a type of slow-wave broadside-coupled microstrip lines. The new structure only requires a single-layer substrate and has the independently controllable even- and odd-mode impedances and slow-wave factors by adjusting the corresponding structural parameters. This property greatly simplifies the circuit design. In addition, it provides a large coupling strength. A miniaturized wideband microstrip rat-race coupler with the high isolation and perfect balances is implemented using the proposed slow-wave coupled lines.

Original languageEnglish
Article number7091946
Pages (from-to)361-363
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume25
Issue number6
DOIs
StatePublished - 1 Jun 2015

Keywords

  • Broadside-coupled microstrip lines
  • high isolation
  • rat-race coupler
  • slow-wave structure

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