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Multiple-beam antenna system

  • US 4,947,176 A
  • Filed: 06/08/1989
  • Issued: 08/07/1990
  • Est. Priority Date: 06/10/1988
  • Status: Expired due to Fees
First Claim
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1. A holographic multiple-beam antenna system capable of forming a plurality of beams at one time in different directions, comprising:

  • an antenna array having a plurality of element antennas arranged in a predetermined configuration;

    a plurality of receiver means each connected to the corresponding one of said element antennas for phase-detecting the signal received by said corresponding element antenna so as to output a digital complex signal which includes amplitude information and phase information;

    a plurality of correction means each adapted to receive the digital complex signal output from the corresponding receiver means and operable to correct the received digital complex signal on the basis of correction data preset in accordance with changes in characteristics of amplitude and/or phase that have occurred in the receiving path from said element antenna to said receiver means corresponding thereto, thereby removing the amplitude and/or phase errors from the digital complex signal; and

    multiple-beam forming means adapted to receive the corrected digital complex signals output from said plurality of correction means and to perform signal processing for forming a plurality of beams, whereby amplitude and/or phase errors occurring in the receiving paths are removed from the digital complex signals to enable highly accurate beams to be formed.

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