A Study on Fabrication and Performance Evaluation of Wideband Receiver using Bias Stabilized Resistor for the Satellite Mobile Communications System

바이어스 안정화 저항을 이용한 이동위성 통신용 광대역 수신단 구현 및 성능 평가에 관한 연구

  • 전중성 (한국해양대학교 전자통신공학과) ;
  • 김동일 (한국해양대학교 전파공학과) ;
  • 배정철 (삼양무선공업㈜ 부설 선박 자동화 연구소)
  • Published : 1999.09.01

Abstract

A wideband RF receiver for satellite mobile communications system was fabricated and evaluated of performance in low noise amplifier and high gain amplifier. The low noise amplifier used to the resistive decoupling and self-bias circuits. The low noise amplifier is fabricated with both the RF circuits and the self-bias circuits. Using a INA-03184, the high gain amplifier consists of matched amplifier type. The active bias circuitry can be used to provide temperature stability without requiring the large voltage drop or relatively high-dissipated power needed with a bias stabilized resistor. The bandpass filter was used to reduce a spurious level. As a result, the characteristics of the receiver implemented here show more than 55 dB in gain, 50.83 dBc in a spurious level and less than 1.8 : 1 in input and output voltage standing wave ratio(VSWR), especially the carrier to noise ratio is a 43.15 dB/Hz at a 1 KHz from 1537.5 MHz.

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