DocumentCode
2081775
Title
All Solid-State Radimeter at 557 GHz
Author
Rüdiger ; Ralph ; Zimmermann, Peter
Author_Institution
Radiometer Physics Company GmbH, Bergerwiesenstr. 15, W-5309 Meckenheim, Germany
Volume
1
fYear
1991
fDate
9-12 Sept. 1991
Firstpage
253
Lastpage
256
Abstract
An all solid-state radiometer is described, for detecting the 557 GHz transition of the water molecule in galactic molecular clouds. The radiometer will be mounted in a high altitude balloon, and is the first of several such units for different experiments in the 550-700 GHz range. The key semiconductor elements are a gunn diode and three Schottky-barrier diodes - two varactors and a low-capacitance low-noise varistor. The double-sideband system noise temperature ature is 2000 K over a 1.1-1.7 GHz i.f. band, and 1500 K over 100 MHz at midband.
Keywords
Clouds; Gunn devices; Radiometry; Schottky diodes; Semiconductor device noise; Semiconductor diodes; Solid state circuits; Temperature; Varactors; Varistors;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1991. 21st European
Conference_Location
Stuttgart, Germany
Type
conf
DOI
10.1109/EUMA.1991.336442
Filename
4136297
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