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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design of the Multisection Impedance Transforming Branch-Line Hybrid Using the Genetic Algorithm

유전자 앨거리즘을 이용한 임피던스 변환 브랜치라인 하이브리드 설계

  • Lee, Gyeong-U (Dept. of Electronic Electrical Engineering, Hanyang University) ;
  • Lee, Sang-Seol (Dept. of Electronic Electrical Engineering, Hanyang University)
  • 이경우 (한양대학교 전자전기공학부) ;
  • 이상설 (한양대학교 전자전기공학부)
  • Published : 2000.06.01
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Abstract

A design method for a multisection impedance transforming branch-line hybrid using a genetic algorithm suitable for MMIC applications is proposed. In contrast to the previous design methods, an asymmetric structure is introduced to optimize the hybrid. Optimization is performed within the impedance range to achieve the realizable hybrids with a microstrip line in a desired frequency range. This design method is applicable to the hybrid which has the arbitrary power division ratio, impedance transforming ratio, isolation, directivity and bandwidth. The hybrid designed by the proposed method has 3∼10％ more bandwidth than the previous results.

MMIC 회로에 적합한 임피던스 변환 광대역 브랜치라인 하이브리드를 유전자 앨거리즘을 이용하여 설계한다. 지금까지의 설계방법과는 달리 비대칭구조를 도입하여 하이브리드를 최적화한다. 각 선로의 임피던스 값은 마이크로스트립라인으로 실제 제작 가능한 범위 안에 들 수 있도록 제한한다. 이 설계 방법은 임의의 전력 분배비, 임피던스 변환비, 아이솔레이션(isolation), 디렉티버티(directivity) 및 대역폭(bandwidth)을 가지는 하이브리드에도 적용 가능하다. 제안된 방식으로 설계된 임피던스 변환 하이브리드는 기존의 하이브리드보다 대역폭이 3∼10% 넓다.

Keywords

References

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