为微波无线电中继链路设计的2ghz MIC前端

1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI:10.1109/EUMA.1979.332650

K. Otremba

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引用次数: 2

摘要

研制了一种低噪声2ghz前端，由MIC隔离器、射频前置放大器、SSB下变频器和传统中频前置放大器组成。总体SSB噪声系数为3 dB，射频带宽为12%。射频前置放大器采用双极晶体管，噪声系数为2.2 dB，增益约为15 dB。射频前置放大器和混频器之间不需要滤波网络，因为采用了一种新颖的单边带下变频电路，噪声系数为6db。

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2 GHZ MIC Front End Designed for a Microwave Radio Relay Link

A low-noise 2 GHz front end has been developed, consisting of MIC isolator, RF preamplifier, SSB downconverter and conventional IF preamplifier. An overall 3 dB SSB noise figure and 12 % RF bandwidth has been achieved. The RF preamplifier, using a bipolar transistor, exhibits a noise figure of 2.2 dB and has about 15 dB gain. No filter network between RF preamplifier and mixer is needed because a novel single sideband downconverter circuit with 6 dB SSB noise figure is used.

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来源期刊

1979 9th European Microwave Conference

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