The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Design of Simple Direct Comparison Measurement System from 10 MHz to 1 GHz for Thermistor Mounts Calibration

서미스터 마운트 교정을 위한 10 MHz에서 1 GHz 주파수 대역의 단순 직접 비교 측정시스템 설계

  • 차윤배 (부경대학교 무기체계공학과) ;
  • 장용근 (공군 제85정밀표준정비창) ;
  • 김부일 (부경대학교 전기전자소프트웨어공학과)
  • Received : 2020.03.25
  • Accepted : 2020.06.15
  • Published : 2020.06.30
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Abstract

The thermistor mount is used for precise RF power measurement because the calibration factor is constant according to the change of power. The calibration factor of the standard mount can be measured with an uncertainty less than 0.5 % from the 10 MHz to 1 GHz by direct comparison with the transfer standard using the DC substitution method. Recently, as the supply of precision power meter based on DC substitution method allows simple and fast measurement, a simple direct comparison measurement system with the same level uncertainty was designed and the minimum required specifications of components through analysis of mismatch error was proposed. The uncertainty was evaluated for system validation, and the results show that uncertainties have been well maintained within 0.5 % in the measurement frequencies.

서미스터 마운트는 전력의 변화에 따른 교정인자 값이 일정하여 정밀한 무선주파수 전력 측정에 사용하고 있다. 표준 마운트의 교정인자는 직류 대체법을 이용하여 전달표준과 직접 비교를 통해 10 MHz부터 1 GHz 대역까지 불확도 0.5 % 이하로 측정할 수 있다. 최근 직류 대체법 기반 정밀한 전력계의 산업계 보급으로 보다 간단하고, 빠른 측정이 가능함에 따라 동일한 불확도 수준의 단순 직접 비교 측정시스템을 설계하고, 부정합 오차의 분석을 통해 구성품의 최소 요구 사양을 제시하였다. 시스템 유효성 검증을 위해 시스템 불확도를 평가하였으며, 불확도 결과는 측정 주파수 대역에서 0.5 % 이내에서 잘 유지되었음을 보여준다.

Keywords

References

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