Title :
A cryogenic focal plane array for 85-115 GHz using MMIC preamplifiers
Author :
Erickson, N.R. ; Grosslein, R.M. ; Erickson, R.B. ; Weinreb, S.
Author_Institution :
Dept. of Phys. & Astron., Massachusetts Univ., Amherst, MA, USA
Abstract :
A new focal plane array for 85-115 GHz is described. This array has 16 pixels, and uses InP MMIC preamplifiers with 40 dB gain, followed by a wideband subharmonic mixer to convert to a 5-20 GHz IF band. A low loss isolator is used to achieve an excellent input match. Square corrugated feed horns are used for efficient filling of the focal plane. Critical components are operated at a temperature of 20 K. The noise temperature varies from 50-130 K, including all pixels, across the full band.
Keywords :
MMIC amplifiers; cryogenic electronics; ferrite isolators; field effect MIMIC; focal planes; horn antennas; millimetre wave amplifiers; millimetre wave mixers; millimetre wave receivers; preamplifiers; radiotelescopes; 20 K; 5 to 20 GHz; 85 to 115 GHz; InP; InP MMIC preamplifiers; cryogenic focal plane array; low loss isolator; square corrugated feed horns; wideband subharmonic mixer; Cryogenics; Feeds; Gain; Impedance matching; Indium phosphide; Isolators; MMICs; Preamplifiers; Temperature; Wideband;
Conference_Titel :
Microwave Symposium Digest, 1999 IEEE MTT-S International
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-5135-5
DOI :
10.1109/MWSYM.1999.779468
