Miniaturized rat race coupler with microstrip-to-CPW broadside-coupled structure and stepped-impedance sections

Jen Tsai Kuo*, Yi Chyun Chiou, Juo Shiuan Wu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

Miniaturization of microstrip rat race coupler is implemented by incorporating a broadside-coupled structure and stepped-impedance line sections into the design. The former is used to replace the 3λ/4-section and the latter is to substitute the λ/4-line in the conventional circuit. No lumped-element is required in the circuit. One of the experimental circuits occupies only 18.3% of the area of a traditional 6λ/4-rat race. It is believed that it has the best size reduction in comparison with those in open literature. In addition to a wideband characteristic, total inband power loss is better than 3.2%. Measurement results are shown to validate the design and theoretical prediction.

Original languageEnglish
Title of host publication2007 IEEE MTT-S International Microwave Symposium Digest
Pages169-172
Number of pages4
DOIs
StatePublished - 2007
Externally publishedYes
Event2007 IEEE MTT-S International Microwave Symposium, IMS 2007 - Honolulu, HI, United States
Duration: 03 06 200708 06 2007

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Conference

Conference2007 IEEE MTT-S International Microwave Symposium, IMS 2007
Country/TerritoryUnited States
CityHonolulu, HI
Period03/06/0708/06/07

Keywords

  • 3-dB coupler
  • Broadside-coupled
  • Miniaturization
  • Rat race
  • Wideband

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