94 GHz固态fm - cw -多普勒雷达廓线仪

Conference Proceedings Second Topical Symposium on Combined Optical-Microwave Earth and Atmosphere Sensing Pub Date : 1995-04-03 DOI:10.1109/COMEAS.1995.472315

D. Klugmann, R. Judaschke

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引用次数: 1

摘要

介绍一种测量云的毫米雷达系统。94 GHz云分析器是一个双基地系统，平均传输功率为1.6 W，仅使用半导体器件构建。由于模块化设计，电源升级是可能的。不带天线的尺寸大约是。65cm/spl倍/42cm/spl倍/22cm。系统重量约为25kg。初始信号由电压控制的连续波Gunn振荡器产生。该信号通过注入锁定同步500mw IMPATT振荡器。系统的核心是一个功率合成器，由四个500mw的IMPATT振荡器组成。发射信号的一部分用作混频器的本地振荡器，它将接收到的信号转换为中频电平。用于从发射和接收信号中导出中频信号的混频器在工作温度为300K时噪声温度T=625K。第一次试验使用的天线直径为157毫米。

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A 94 GHz solid state FM-CW-Doppler radar profiler

Describes a millimetre radar system for the measurement of clouds. The 94 GHz cloud profiler is a bistatic system with an average transmitted power of 1.6 W and it is built up using only semiconductor devices. Due to the modular design power upgrade is possible. It's size without antenna is approx. 65cm/spl times/42cm/spl times/22cm. The weight of the system is about 25 kg. The initial signal is generated by a voltage controlled CW Gunn oscillator. This signal synchronizes a 500 mW IMPATT oscillator by injection locking. The heart of the system is a power combiner consisting of four 500 mW IMPATT oscillators. A fraction ofthe transmitted signal is used as a local oscillator of the mixer which converts the received signal to IF-level. The mixer used for deriving the IF signal from transmitted and received signals has a noise temperature of T=625K at a operation temperature of 300K. The diameter of the antenna used for the first tests is 157 mm.<>

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Conference Proceedings Second Topical Symposium on Combined Optical-Microwave Earth and Atmosphere Sensing

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