DocumentCode
1987177
Title
Airborne Imaging System using Cryogenic Receiver Modules at 90 and 140 GHz
Author
Vowinkel, B. ; Grüner, K. ; Süss, H. ; Reinert, W.
Author_Institution
Physikalisches Institut der Universitÿt Köln, UniversitÿtsstraÃ\x9fe 14 D-5000 Köln 41, FRG
fYear
1983
fDate
3-8 Sept. 1983
Firstpage
464
Lastpage
469
Abstract
A high-resolution airborne imaging system has been developed that uses cryogenic receiver modules at 90 and 140 GHz. They consist of Schottky-barrier mixers followed by GaAs-FET IF amplifiers. The DSB receiver noise temperatures are 210 K for the 90 GHz and 250 K for the 140 GHz system. The instantaneous bandwidth is 2.5 GHz for both front-ends. Results of some flight tests are presented.
Keywords
Bandwidth; Cryogenics; Frequency; Gunn devices; High-resolution imaging; Image resolution; Microwave imaging; Mirrors; Temperature sensors; Testing;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1983. 13th European
Conference_Location
Nurnberg, Germany
Type
conf
DOI
10.1109/EUMA.1983.333271
Filename
4131933
Link To Document