Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A 6-Bit MMIC Digital Attenuator with High Attenuation Accuracy and Small Phase Variation for X-band TR Module Applications

X-band 송수신 모듈을 위한 높은 감쇠 정확도와 작은 위상 변동을 가진 6 비트 MMIC 디지털 감쇠기

  • 주인권 (한국전자통신연구원 무선RF.탑재기술연구팀) ;
  • 염인복 (한국전자통신연구원 무선RF.탑재기술연구팀) ;
  • 이정원 (엘아이지 넥스원) ;
  • 이수호 (엘아이지 넥스원) ;
  • 안창수 (국방과학연구소) ;
  • 김선주 (국방과학연구소) ;
  • 박동운 (충남대학교 전기정보통신공학부) ;
  • 오승엽 (충남대학교 전기정보통신공학부)
  • Published : 2009.08.05
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Abstract

A 6-bit MMIC digital attenuator applicable to X-band TR module has been developed by using $0.5{\mu}m$GaAs pHEMT processes. The Switched-T attenuator scheme and the switched-path attenuator scheme were adopted to obtain low insertion loss and small phase variation, respectively. Resistors and transmission lines are optimized to achieve the digital attenuator with high attenuation accuracy and small phase variation. The digital attenuator has RMS error of 0.4dB, resolution of 0.5dB and dynamic range of 31.5dB. The measurement results show that in-out VSWRs are less than 1.5, phase variation is from -7 to +2 degrees and IIP3 is 36.5dBm.

Keywords

References

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