A New Class of Wideband Multisection 180° Hybrid Rings Using Vertically Installed Planar Couplers

Chun Hsiang Chi, Chi-Yang Chang

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

A new class of wideband multisection 180° hybrid rings using the vertically installed planar (VIP) coupler is proposed. On the basis of the reconfigured ideal single-section 180° hybrid ring (i.e., the 180° hybrid ring with an ideal phase inverter), the multisection 180° hybrid rings can be realized by properly cascading of single-section 180° hybrid rings. Compared with the conventional hybrid ring, the two-section hybrid rings exhibit wide bandwidth, size reduction, and easily achievable high power-division ratios. Design equations based on the equal-ripple functions are derived. Design curves for the equal and unequal power-division ratio are also described. In addition, a cascade of single-section cascadable hybrid rings with a unit element at each I/O port can be used for bandwidth enhancement. Good agreement is obtained between the experimental and simulated results.

Original languageEnglish
Pages (from-to)2478-2486
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Volume54
Issue number6
DOIs
StatePublished - 6 Jun 2006

Keywords

  • Multisection 180° hybrid ring
  • phase inverter
  • vertically installed planar (VIP) coupler
  • wideband 180° hybrid ring

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