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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design and Implementation of Isolator for PCS Phone

PCS단말기용 아이솔레이터의 설계제작

  • 권원현 (안양대학교 정보통신공학과) ;
  • 김태현 ((주) 스타트 텔레콤) ;
  • 이영훈 (호남대학교 전파공학과)
  • Published : 2000.03.01
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Abstract

In this paper, lumped-element isolator is analyzed and designed using the scattering matrix approach. Using the designed parameters, compact isolator with 7.0x7.0x2.3 mm$^3$ dimensions is fabricated and tested in 1.765GHz PCS phone band. Implemented isolator shows 29.95dB isolation characteristic at center frequency and has 0.35dB insertion loss in overall 30MHz operating bandwidth. Return losses of input and output port are measured below -19 dB. Experimental results show that the implemented isolator has better performances than the conventional one.

본 연구에서는 집중정수형 아이솔레이터를 산란행렬을 이용하여 해석 및 설계하고, 설계된 최적 파라메타 를 이용하여 1.7650Hz 대역의 PCS 단말기용 소형 아이솔레이터를 제작하고 시험하였다. 7.Ox7.Ox2.3㎣ 의 크기로 구현된 아이솔레이터의 전력 Isolation S/sub 12/는 중심주파수에서 약 29.95 dB 이상으로 측정되었으며, 삽입손실 S/sub 21/특성은 30MHz 동작 대역폭 내에서 약 0.35 dB 이하의 손실을 나타내었다. 입출력단 반 사계수 5/sub 11/ 및 5/sub 22/는 동작대역폭 내에서 -19 dB로 측정되어 구현된 제품이 기존의 제품에 비해 우수한 성 능 특성을 지니고 있음을 알 수 있었다.

Keywords

References

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