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Terrestrial antennas for satellite communication system

  • US 5,905,466 A
  • Filed: 07/08/1997
  • Issued: 05/18/1999
  • Est. Priority Date: 11/08/1991
  • Status: Expired due to Term
First Claim
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1. An apparatus for use with a satellite communication device which is capable of communicating directly with a satellite in Earth orbit comprising:

  • an antenna surface being generally hemispherical in shape and capable of transmitting and receiving radio beams to and from said satellite in Earth orbit;

    said antenna surface being capable of steering radio beams in an azimuth dimension and in an elevation dimension; and

    a plurality of phased-array antenna elements disposed along said antenna surface, said phased-array elements each including upper and lower conducting surfaces separated by an insulating layer, said upper conducting surface being sized to operate at a first predetermined frequency and said lower conducting surface being sized to operate at a second predetermined frequency different from said first predetermined frequency.

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