Design of a Novel Lumped Element Backward Directional Coupler Based on Parallel Coupled-Line Theory

평행 결합선로 이론에 근거한 새로운 집중 소자형 방향성 결합기 해석 및 설계

  • 송택영 (순천향대학교 정보기술공학부) ;
  • 이상현 (순천향대학교 정보기술공학부) ;
  • 김영태 (순천향대학교 정보기술공학부) ;
  • 천창율 (서울시립대학교 전자공학과) ;
  • 박준석 (순천향대학교 정보기술공학부)
  • Published : 2002.11.01

Abstract

In this paper, a novel lumped equivalent circuit for a conventional parallel directional coupler is proposed. The equivalent circuit and design formula for the presented lumped element coupler is derived based on the even-and odd-mode properties of a parallel-coupled line. By using the derived design formula, we have designed the 3㏈ and 10㏈ lumped element directional couplers at the center frequency of 100Mhz. Furthermore, a chip type directional coupler has been designed to fabricate with multilayer configurations by employing the Low Temperature CofiredCeramic (LTCC) process. Designed chip-type directional coupler has a 10㏈-coupling value at the center frequency of 2㎓. Excellent agreements between simulations and measurements on the designed directional couplers show the validity of this paper

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