A 15 element focal plane array for 100 GHz

Details A 15 element focal plane array for 100 GHz A 15 element focal plane array for 100 GHz

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992itmtt..40....1e&link_type=abstract

IEEE Transactions on Microwave Theory and Techniques (ISSN 0018-9480), vol. 40, Jan. 1992, p. 1-11.

Astronomy and Astrophysics

Astronomy

54

Focal Plane Devices, Microwave Antennas, Phased Arrays, Radio Astronomy, Radio Receivers, Antenna Feeds, High Electron Mobility Transistors, Horn Antennas, Intermediate Frequency Amplifiers, Mixing Circuits, Schottky Diodes, Seeing (Astronomy), Single Sideband Transmission

Scientific paper

A focal plane imaging array receiver is described which covers the 86-115 GHz frequency range for radio astronomical observations. The 3 x 5 element array uses cryogenic Schottky diode mixers with integrated HEMT IF amplifiers. A cold quasi-optical filter selects the desired sideband, and terminates the image at 20 K. Polarization interleaving is used to minimize the array size on the sky. LO power is provided by a frequency tripled YIG tuned oscillator. The average receiver noise temperature of the array pixels varies from 250-350 K SSB depending on the frequency. Only three mechanical tuners are used in the system and all functions are under computer control.

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