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Array antenna having multiple independently steered beams

  • US 6,232,920 B1
  • Filed: 06/26/2000
  • Issued: 05/15/2001
  • Est. Priority Date: 01/14/1998
  • Status: Expired due to Fees
First Claim
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1. An RF circuit comprising:

  • a first directional coupler having a first port, a second port, a third port and a fourth port;

    a phase shifter having a first port coupled to the third port of said first directional coupler and having a second port;

    a second directional coupler having a first port coupled to the second port of said phase shifter and having a second port, a third port and a fourth port;

    an antenna element coupled to the first port of said first coupler;

    a first termination coupled to the second port of said first directional coupler; and

    a second termination coupled to the third port of said second directional coupler.

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