{"title":"A 94 GHz solid state FM-CW-Doppler radar profiler","authors":"D. Klugmann, R. Judaschke","doi":"10.1109/COMEAS.1995.472315","DOIUrl":null,"url":null,"abstract":"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.<<ETX>>","PeriodicalId":274878,"journal":{"name":"Conference Proceedings Second Topical Symposium on Combined Optical-Microwave Earth and Atmosphere Sensing","volume":"164 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1995-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference Proceedings Second Topical Symposium on Combined Optical-Microwave Earth and Atmosphere Sensing","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/COMEAS.1995.472315","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
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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