New miniaturized dual-band rat-race coupler with microwave C-sections

Yi Chyun Chiou*, Jen Tsai Kuo, Chi Hung Chan

*Corresponding author for this work

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

25 Scopus citations

Abstract

Based on microwave C-sections, rat-race coupler is designed to have a dual-band characteristic and a miniaturized area. The C-section together with two transmission line sections attached to both of its ends is synthesized to realize a phase change of 90° at the first frequency, and 270° at the second passband. The equivalence is established by the transmission line theory, and transcendental equations are derived to determine its structure parameters. Two circuits are realized in this presentation; one is designed at 2.45/5.2 GHz and the other at 2.45/5.8 GHz. The latter circuit occupies only 31% of the area of a conventional hybrid ring at the first band. It is believed that this circuit has the best size reduction for microstrip dual-band rat-race couplers in open literature. The measured results show good agreement with simulation responses.

Original languageEnglish
Title of host publicationIMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest
Pages701-704
Number of pages4
DOIs
StatePublished - 2009
Externally publishedYes
Event2009 IEEE MTT-S International Microwave Symposium, IMS 2009 - Boston, MA, United States
Duration: 07 06 200912 06 2009

Publication series

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

Conference

Conference2009 IEEE MTT-S International Microwave Symposium, IMS 2009
Country/TerritoryUnited States
CityBoston, MA
Period07/06/0912/06/09

Keywords

  • Dual-band
  • Microstrip line
  • Microwave C-section
  • Miniaturization
  • Rat-race coupler

Fingerprint

Dive into the research topics of 'New miniaturized dual-band rat-race coupler with microwave C-sections'. Together they form a unique fingerprint.

Cite this