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

• Published in: IEEE transactions on antennas and propagation Vol. 39; no. 3; pp. 391 - 400
• Main Authors: Davis, R.M., Cha, C.-C., Kamak, S.G., Sadigh, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.1991; Institute of Electrical and Electronics Engineers
• Subjects: Antennas; Applied sciences; Bandwidth; Beam steering; Computational modeling; Computer architecture; Exact sciences and technology; Feeds; Lenses; Phased arrays; Radiocommunications; Receiving antennas; Reflector antennas; Telecommunications; Telecommunications and information theory; Transmitting antennas; Reflector antenna; System architecture; Scanning; Computer simulation; Passband; Experimental study; Performance; Impulse
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/8.76339

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 degrees to 15 degrees appears to be possible while still supporting gain magnifications of four to five.< >