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Multibeam adaptive array

  • US 4,032,922 A
  • Filed: 01/09/1976
  • Issued: 06/28/1977
  • Est. Priority Date: 01/09/1976
  • Status: Expired due to Term
First Claim
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1. A system comprising:

  • a Butler matrix including at least a plurality of input ports, a first plurality of hybrid couplers coupled to said input ports, a plurality of phase shifters coupled to said first plurality of hybrid couplers, a second plurality of hybrid couplers coupled to said plurality of phase shifters;

    a plurality of antenna elements; and

    a plurality of adaptive means, each being coupled between one of said plurality of antenna elements and a corresponding one of said second plurality of hybrid couplers for minimizing the amplitude of an undesired signal received by said one of said plurality of antenna elements to which it is coupled, each adaptive means including means for comparing said received signal with a reference signal to develop an error signal for feedback control.

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