A scanning reflector using an off-axis space-fed phased-array feed

Author

Davis, Richard M. ; Cha, Chung-Chi ; Kamak, Stephen G. ; Sadigh, Ali

Author_Institution

Mitre Corp., Bedford, MA, USA

Volume

39

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

391

Lastpage

400

Abstract

An architecture for a scanning reflector antenna that supports wide-angle scanning, multioctave tunable bandwidths, transmit and receive operation, and monopulse processing is presented. It consists of a parabolic dish with an offset phased array. The array is actually a feed-through lens fed from a small feed array in the back of the lens. Beam steering is accomplished by using the feed array to illuminate clusters of elements within the lens that correspond to far-field beam positions. The evolution of the architecture and a computer model is described. Simulated and measured performance results are reported. Off-axis scanning of 10° to 15° appears to be possible while still supporting gain magnifications of four to five

Keywords

antenna feeders; antenna phased arrays; reflector antennas; scanning antennas; beam steering; computer model; feed-through lens; monopulse processing; multioctave tunable bandwidths; off-axis space-fed phased-array feed; offset phased array; parabolic dish; receive operation; scanning reflector antenna; transmit operation; wide-angle scanning; Bandwidth; Beam steering; Computational modeling; Computer architecture; Feeds; Lenses; Phased arrays; Receiving antennas; Reflector antennas; Transmitting antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.76339

Filename

76339