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NETWORK APPROACH FOR REDUCING THE NUMBER OF PHASE SHIFTERS IN A LIMITED SCAN PHASED ARRAY

  • US 3,803,625 A
  • Filed: 12/18/1972
  • Issued: 04/09/1974
  • Est. Priority Date: 12/18/1972
  • Status: Expired due to Term
First Claim
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1. A scanning phased array antenna system having a predetermined number N of antenna elements, and a distribution network having a common input terminal and a predetermined number of distribution ports M, where M is a smaller number than N, comprising:

  • M phase shifters each connected at its input discretely from a corresponding one of said M distribution ports;

    a subarray interconnecting network having N output ports and M input ports, each of said N output ports being connected discretely to a corresponding one of said antenna elements, and each of said M input ports being connected discretely to the output of a corresponding one of said phase shifters;

    divider means within said subarray interconnecting network for dividing the power input from each of said phase shifters into a primary branch and a plurality of secondary branches, said primary branch being connected to a selected one of said antenna elements and said secondary branches feeding an equal number of antenna elements adjacent on each side of said selected element; and

    means associated with each antenna element fed from one of said secondary branches for combining feeds from said branches providing feed thereto from others of said phase shifters.

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