Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Modified Design of Branch-Line Coupler for Harmonic Suppression

고조파 제거 기능을 갖는 브랜치라인 커플러의 설계

  • Kim, Jong-Sung (Department of Electronics, Information and Communication, Kyungsung University)
  • 김종성 (경성대학교 전자정보통신공학부)
  • Received : 2010.02.04
  • Accepted : 2010.06.10
  • Published : 2010.06.25
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Abstract

This paper presents the modified design that can reject the harmonic signals in the branch-line coupler. After adding open stubs at the center of quarter-wavelength lines of the traditional design, all network parameters can be determined by network equivalence, in order to maintain the conventional function at the operating frequency and suppress its harmonic terms to de chosen. Experimental results show the second and third harmonic suppressions to be -37.5 and -42.7dBs, while maintaining conventional performance at the fundamental frequency.

이 논문은 브랜치라인 커플러에서 고조파 신호를 제거할 수 있는 변형된 설계 방법을 제안한다. 기존의 1/4 파장 길의의 전송선로의 중앙에 개방형 스터브를 추가한 후에, 설계 주파수에서는 커플러의 기능을 제공하고 고조파 주파수에서는 전송을 제한하는 특성을 갖는 커플러의 해를 구하는 것이 가능하다. 이의 검증 예로서 1.0GHz에서 커플러를 제작하였으며 2.0GHz와 3.0GHz에서 -37.5dB 및 -42.7dB의 억압비를 나타내었다.

Keywords

References

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