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

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Study on Variations of Bandwidth for a Microstrip Line Diplexer

마이크로스트립 형 다이플렉서 대역폭의 가변성에 관한 연구

  • Park, Yhl (Dept. of Information & Comm, Dongyang Mirae University)
  • 박일 (동양미래대학 정보통신과)
  • Received : 2010.01.12
  • Published : 2011.02.25
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Abstract

This paper shows variations on bandwidth for the 5-microstrip 4-port structure by cutting out part of 2nd and 4th line of 5 lines. In 2nd line case, the bandwidth to pass is decreased by 300MHz and one of two input ports operates in diplexer. Both of 2nd and 4th line cut takes each of two input ports as a diplexer. The bandwidth for 4th line case has almost same bandwidth for the unmodified structure, a bit wider than that of the 2nd line case. Especially the isolation between input and other out port in center frequency of stop band shows 41dB for port 1, 32dB for port 2.

본 논문에서는 5-마이크로스트립선의 4-포트 다이플렉서에서 선간 간격을 조정 한 결과로부터 2번, 4번 선로 길이를 변동 시켜서 대역폭에 대한 변화를 알아보았다. 2번 선로 길이만을 조정한 경우 대역폭이 300MHz 축소되었으며 다이플렉서 특성을 한개 포트 입력에서만 구할 수 있었으나 2, 4번 선로 길이를 동시에 조정한 경우는 입력 포트 2개에서 모두 다이플렉서 특성을 얻을 수 있었다. 통과 대역에 대한 대역폭은 4번 선로의 변동 시 변경 전과 동일한 결과를 얻었다. 특히 저지대역에서는 선로 길이 조정 전보다 중심 주파수에서 출력 포트와의 이격도가 1번 포트 입력인 경우 41dB, 2번 포트 입력에 대한 출력 포트간 이격도는 32dB을 보인다.

Keywords

References

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