Quasi optical triplexing feed for AMSU-B radiometer

Author

Martin, R.J. ; Hall, W.J.

Author_Institution

BAe Space Systems Ltd., Stevenage, UK

fYear

1993

fDate

1993

Firstpage

930

Abstract

Describes the triplexing feed for the AMSU-B satellite-borne radiometer which was designed using quasi-optic methods. This radiometer has been produced for the UK Meteorological Office and works in three bands around 89 GHz, 150 GHz and 183 GHz for the measurement of atmospheric water vapour profiles. The problem of triplexing 89 GHz, 150 GHz and 183 GHz channels within a restricted volume has been solved using a quasi-optical feed. This feed uses ellipsoidal mirrors for focusing, drilled plate filters for frequency separation and corrugated horn feeds. It was designed using Gaussian mode concepts supported by a full physical optics diffraction analysis. A loss requirement of 1 dB is easily met

Keywords

aerospace instrumentation; antenna feeders; atmospheric measuring apparatus; microwave measurement; radiometers; satellite antennas; 1 dB; 150 GHz; 183 GHz; 89 GHz; AMSU-B radiometer; AMSU-B satellite-borne radiometer; EHF; Gaussian mode concepts; UK Meteorological Office; atmospheric water vapour profiles; corrugated horn feeds; drilled plate filters; ellipsoidal mirrors; focusing; frequency separation; loss; physical optics diffraction analysis; quasioptical triplexing feed;

fLanguage

English

Publisher

iet

Conference_Titel

Antennas and Propagation, 1993., Eighth International Conference on

Conference_Location

Edinburgh

Print_ISBN

0-85296-572-9

Type

conf

Filename

224769