Segmented phased array antenna system with mechanically movable segments
First Claim
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1. A phased array antenna system, comprising:
- a plurality of antenna segments, each segment comprising a plurality of antenna elements mounted therein;
support means including means for mounting the segments such that each segment is rotatable about an associated axis between respective first and second positions, said associated axis about which each segment is rotatable being parallel to said associated axis of each of the other said segments and spaced apart from the axes of said other segments in a direction normal to said axes; and
,phased array feed means for feeding electromagnetic radiation along a feed path to and from each antenna element, the feed means including means for providing phase or time delays to the electromagnetic radiation in each feed path, such that when the segments are in their respective first positions, the antenna system can transmit and receive electromagnetic radiation along a first range of directions, and such that when the segments are in their respective second positions, the antenna system can transmit and receive electromagnetic radiation along a second range of directions different from the first range of directions.
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Abstract
A segmented phased array antenna system for scanning two different ranges of directions with a single set of antenna elements. The system comprises a plurality of segments (40), each of which has a plurality of antenna elements (48) mounted therein. The segments are mounted by support means (42, 44, 46) such that each segment is movable between first and second positions. In each set of positions, the antenna elements are operated as a conventional phased array radar system. The antenna system may be longitudinally mounted along the upper surface of the fuselage of an airplane (10) to provide side-looking radar coverage to both sides of the airplane.
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Citations
16 Claims
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1. A phased array antenna system, comprising:
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a plurality of antenna segments, each segment comprising a plurality of antenna elements mounted therein; support means including means for mounting the segments such that each segment is rotatable about an associated axis between respective first and second positions, said associated axis about which each segment is rotatable being parallel to said associated axis of each of the other said segments and spaced apart from the axes of said other segments in a direction normal to said axes; and
,phased array feed means for feeding electromagnetic radiation along a feed path to and from each antenna element, the feed means including means for providing phase or time delays to the electromagnetic radiation in each feed path, such that when the segments are in their respective first positions, the antenna system can transmit and receive electromagnetic radiation along a first range of directions, and such that when the segments are in their respective second positions, the antenna system can transmit and receive electromagnetic radiation along a second range of directions different from the first range of directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification