The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design and Fabrication of a C-Band Delay Line Instantaneous Frequency Measurement Receiver with Offset Voltage Compensation

오프셋 전압 보상이 적용된 지연 선로 구조의 C 대역 순시 주파수 측정용 수신기 설계 및 제작

  • Jeon, Moon-Su (Department of Radio Science and Engineering, Chungnam National University) ;
  • Jeon, Yeo-Ok (Department of Radio Science and Engineering, Chungnam National University) ;
  • Seo, Won-Gu (Department of Radio Science and Engineering, Chungnam National University) ;
  • Bae, Kyung-Tae (Department of Radio Science and Engineering, Chungnam National University) ;
  • Kim, Dong-Wook (Department of Radio Science and Engineering, Chungnam National University)
  • Received : 2015.10.14
  • Accepted : 2015.12.11
  • Published : 2016.01.31
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Abstract

In this paper, we design and fabricate an instantaneous frequency measurement receiver with a frequency resolution of 125 MHz which detects and measures continuous signals in 4~6 GHz using path difference of delay lines. The receiver has a 4-bit configuration and consists of power dividers, delay lines, power combiners, power detectors, voltage comparator circuits and so on. The accuracy of the instantaneous frequency measurement is improved by applying offset voltage compensation to the comparator circuits to compensate the frequency-dependent path loss of the delay line and the frequency dependence of power detection.

본 논문에서는 지연 선로의 경로차를 이용하여 4~6 GHz의 연속파 신호를 감지하여 125 MHz의 해상도로 순시 주파수를 측정하는 순시 주파수 측정용 수신기를 설계 및 제작하였다. 수신기는 4 비트 지연 선로 구조를 가졌으며, 전력 분배기, 지연 선로, 전력 합성기, 전력 검파기, 비교기 등으로 구성되었다. 각각의 비트에 배정된 지연 선로의 주파수에 따른 경로 손실 차이를 보상하고, 전력 검파 특성의 주파수 의존성을 보정하기 위해 오프셋 전압 보상을 비교기에 적용하여 측정의 정확성을 향상시켰다.

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References

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