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

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Design of a Microwave Radiometer Receiver for Soil Moisture monitoring

토양 수분 모니터링용 마이크로파 라디오미터 수신기 설계

  • 손홍민 (호남대학교 대학원 전파공학과) ;
  • 박홍균 (호남대학교 대학원 전파공학과)
  • Received : 2013.11.05
  • Accepted : 2014.02.11
  • Published : 2014.02.28
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Abstract

The development process of a L-Band microwave radiometer for remote sensing of soil-moisture are described in this paper. Achieving the development aim of the measurement accuracy within 2% for soil moisture content of 0~50%, the requirements and specifications of the microwave radiometer and its receiver are drawn. The receiver with high gain, high sensitivity is designed and implemented to satisfy these requirements and specifications. The receiver has the bandwidth of 40 MHz, the system gain of 50 dB and the sensitivity of average value 0.19 K, maximum value 0.313K at 1390 MHz.

본 논문은 토양에서 복사되는 마이크로파 대역의 미약한 열잡음 전력을 수신하여 토양 수분 함유량의 변화를 실시간으로 원격모니터링이 가능한 L-Band 마이크로파 라디오미터를 설계하는 내용에 관하여 기술한다. 토양 수분 함유량 0%~50%의 측정범위와 최대 오차 2%의 목표 성능을 달성하기 위해 토양 수분함유량에 따른 토양의 복사특성을 연구 및 목표 사양을 도출하였으며, 이를 바탕으로 도출된 사양을 만족시키는 마이크로파 라디오미터의 수신기를 설계 및 제작하였다. 제작된 수신기는 주파수 1390MHz, 대역폭 40MHz으로 50dB의 시스템 이득과 1.54dB의 NF를 가지며, 최대 0.313K, 평균 0.19K의 수신감도를 갖는다.

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References

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