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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Directivity compensation of crossed waveguide directional coupler

교차도파관 방향성결합기의 방향성 성능 개선

  • Kim, Dong-Hyun (Department of Telecommunication Engineering, Cheju National University) ;
  • Yang, Doo-Yeong (Research Institute of Advanced Technology, Cheju National University)
  • 김동현 (제주대학교 통신공학과) ;
  • 양두영 (제주대학교 공과대학 첨단기술연구소)
  • Published : 2007.09.25
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Abstract

The directivity of crossed waveguide directional coupler is generally decreased according as coupling coefficient of it increase. In this paper, the geomertical parameters of crossed slot pair for directivity improvement is modified and the formulas for design of it are proposed. The crossed waveguide directional coupler designed upon the formulas is fabricated with the WR42 waveguide in K-band. The measured results show that the coupling coefficient is 21.5 dB and directivity is minimum 23.9 dB over the operating frequency from 18GHz to 26.5GHz.

교차도파관 방향성결합기는 결합도가 증가함에 따라 방향성이 감소하는 특성을 갖고 있다. 본 논문에서는 교차도파관 방향성결합기의 방향성을 향상시킬 수 있도록 X형 슬롯 쌍의 구조 변수를 수정하고, 그에 따른 관계식을 제안하였다. 그리고 K밴드 주파수 대역에서 그 관계식을 토대로 설계된 교차도파관 방향성결합기는 WR42 도파관을 사용하여 제작하였다. 측정한 결과 WR42 주파수 대역인 $18GHz{\sim}26.5GHz$에서 평균 결합도는 21.05dB, 방향성은 최소 23.9dB로 나타났다.

Keywords

References

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