Electronically scanned antenna
First Claim
1. An electronically scanned antenna including an array of elementary sources, feed and control electronics and an energy-focusing reflector with the array being situated in the focal zone of the reflector, the feed and control electronics comprising:
- hybrid couplers each corresponding to a respective one of the elementary sources and each providing a coupler output;
amplifier circuits for amplifying said coupler outputs;
beam-forming circuits receiving the amplified coupler outputs as inputs and adjusting the amplitude and phase thereof, each said beam forming circuit constituted by an adjustable phase shifter and an adjustable attenuator individually controlled by a control unit; and
at least one combiner constituted by a set of hybrid junctions for combining outputs of said beam forming circuits to deliver a useful output signal corresponding to a given beam.
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Accused Products
Abstract
The invention relates to an electronically scanned antenna comprising an array (11) of elementary sources, an energy-focusing reflector (10), and feed and control electronics; the array (11) is situated in the focal zone of the reflector, while the feed and control electronics includes a plurality of attenuator and phase shifter circuits (24) controlled by a control unit (27), with said circuits having their outputs connected to at least one combiner (28). The invention is particularly suitable for space telecommunications.
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Citations
6 Claims
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1. An electronically scanned antenna including an array of elementary sources, feed and control electronics and an energy-focusing reflector with the array being situated in the focal zone of the reflector, the feed and control electronics comprising:
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hybrid couplers each corresponding to a respective one of the elementary sources and each providing a coupler output; amplifier circuits for amplifying said coupler outputs; beam-forming circuits receiving the amplified coupler outputs as inputs and adjusting the amplitude and phase thereof, each said beam forming circuit constituted by an adjustable phase shifter and an adjustable attenuator individually controlled by a control unit; and at least one combiner constituted by a set of hybrid junctions for combining outputs of said beam forming circuits to deliver a useful output signal corresponding to a given beam. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification