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Feed network

  • US 6,788,272 B2
  • Filed: 09/23/2002
  • Issued: 09/07/2004
  • Est. Priority Date: 09/23/2002
  • Status: Expired due to Term
First Claim
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1. An antenna feed network including:

  • a 180°

    hybrid coupler having a feed port, a 0°

    port; and

    a 180°

    port having an approximately 180°

    phase difference with the 0°

    port;

    a first antenna port coupled to the 0°

    port;

    a second antenna port coupled to the 0°

    port via a respective phased line, the second antenna port having an approximately 90°

    phase difference with the first antenna port;

    a third antenna port coupled to the 180°

    port; and

    a fourth antenna port coupled to the 180°

    port via a respective phased line, the fourth antenna port having an approximately 90°

    phase difference with the third antenna port.

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