Journal of the Korean Institute of Telematics and Electronics A (전자공학회논문지A)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A study on an analysis of the impedance matching efficiency of 100 GHz band waveguide - type SIS mixer

100 GHz 대역 도파관형 SIS 믹서의 임피던스 정합 효율에 관한 해석

  • 한석태 (천문대. 대덕전파전문대) ;
  • 김효령 (천문대. 대덕전파전문대) ;
  • 이창훈 (천문대. 대덕전파전문대) ;
  • 박종애 (이화여자대학교 물리학과) ;
  • 정현수 (천문대. 대덕전파전문대) ;
  • 김광동 (천문대. 대덕전파전문대) ;
  • 김태성 (천문대. 대덕전파전문대) ;
  • 박동철 (충남대학교 전파공학과)
  • Published : 1996.06.01
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Abstract

Quantum RF impedance of SIS (superconductor insulator superconductor) junction has been analyzed by using through on tucker's quantum mixer theory in the frequency range form 80 GHz to 120 GHz. The embedding impedance of waveguide-type mixer mount and its equivalent circuit have been evaluated. From these evaluated results, the impedance matching efficiency between mixer mount embedding impedance and mixer port impedance of upper-side band and IF which were determined by augmented admittance matrix with given backshort position has been discussed in detail. It is found that the mixer with fixed backshort mount ahs a impedance matching efficiency about 80% at each port of mixer within 85GHz to 115GHz, which implys a conversion los of mixer would be good enough to be operated such a wide band frequency range. Therefore, the theoretical evaluated results show that our method can be used ot design the mixer mount without any mechanical tuning elements such a backshort or an E-plane tunners for wide band operation.

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