Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ijimw...9..667m&link_type=abstract
International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 9, Aug. 1988, p. 667-704.
Astronomy and Astrophysics
Astronomy
6
Antenna Arrays, Focal Plane Devices, Millimeter Waves, Optical Heterodyning, Radio Astronomy, Radio Receivers, Apertures, Cassegrain Antennas, Phased Arrays, Plane Waves
Scientific paper
Maximization of the throughput of a single large antenna is investigated for the cases of focal plane imaging arrays and aperture plane phased arrays. Trade-offs between these two types of arrays are considered with respect to field of view, sampling efficiency, and time to map a source. Limits imposed on the number of feed elements in an imaging array by the deterioration in aperture efficiency off-axis are determined. Advantages of the focal plane array over the aperture plane array include simpler electronics and fewer restrictions on the field of view.
Murphy John Anthony
Padman Rachael
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