Size Reduction and Harmonic Suppression of Rat-Race Hybrid Coupler Using Defected Ground Structure

Y. J. Sung, C. S. Ahn, Y. S. Kim

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

In this letter, a defected ground structure (DGS) is applied to design a compact microstrip rat-race hybrid coupler. The proposed structure can achieve both a significant reduction of size and harmonic signal. By embedding the DGS section, it is observed that the resonant frequency of the hybrid coupler is significantly lowered, which can lead to a large amount of size reduction for a fixed frequency operation. Besides, the third harmonic signal is suppressed to -30 dB with respect to a conventional rat-race hybrid coupler. In this case, the measured insertion loss is comparable to that of a conventional hybrid coupler.

Original languageEnglish
Pages (from-to)7-9
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume14
Issue number1
DOIs
Publication statusPublished - 2004 Jan

Keywords

  • Defected ground structure
  • Rat-race coupler

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Size Reduction and Harmonic Suppression of Rat-Race Hybrid Coupler Using Defected Ground Structure'. Together they form a unique fingerprint.

  • Cite this