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研制的4.3GHz无线电高度表微波集成前端已得到实际应用,它代替了整机原用的振荡-放大一倍频方案,提高了效率、减小了体积.微波集成前端采用了高线性度FET压控振荡器作发射源,采用高隔离度的单桥路不等负载三分贝混合环混频器.在-40°～70℃的环境温度范围内发射功率大于150mW,压控带宽123MHz,线性度小于3%,接收机噪声系数小予8dB.
Developed 4.3GHz radio altimeter microwave integrated front-end has been the practical application, it replaces the original machine oscillation - the amplification of a double frequency solution, improve efficiency and reduce the size of the microwave integrated front end using a high linearity FET pressure Controlled oscillator for the launch of the source, the use of high isolation single bridge unequal load three decibel mixed-loop mixer in the ambient temperature range of -40 ° ~ 70 ℃ transmit power greater than 150mW, voltage-controlled bandwidth of 123MHz, linearity Less than 3%, the receiver noise figure is small to 8dB.