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Beam scanning antennas with plurality of antenna elements for scanning beam direction

  • US 6,184,828 B1
  • Filed: 08/12/1999
  • Issued: 02/06/2001
  • Est. Priority Date: 11/18/1992
  • Status: Expired due to Fees
First Claim
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1. An array antenna comprising:

  • a circular antenna array constructed of a number i of antenna elements disposed on a periphery of a circle at respective position angles ψ

    i relative to a radial axis of the circle; and

    phase shifting means for giving a respective phase shift α

    i to radiation directivity of each of said antenna elements and for making the phase shift α

    i equal to n times the position angle ψ

    i, n being an integer excluding 0, wherein said phase shifting means comprises a rotating antenna element and said rotating antenna element comprises said antenna elements, each of which rotates for an angle α

    i.

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