RF beam center location method and apparatus for power transmission system

  • US 4,088,999 A
  • Filed: 05/21/1976
  • Issued: 05/09/1978
  • Est. Priority Date: 05/21/1976
  • Status: Expired due to Term
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First Claim
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1. In an RF power transmission system wherein an energy source generates an energy beam towards a receiving structure, apparatus for locating the center of the energy beam incident on said receiving structure, said apparatus comprising:

  • a planar array of RF receiver elements arranged about a physical center in a matrix pattern;

    means for providing signals indicative of the energy received by each of said receiver elements;

    means for summing the signal quantities for all the receiver elements to the right of a predetermined vertical center line of said planar array to provide a right azimuth sum quantity;

    means for summing the signal quantities for all the receiver elements to the left of a predetermined vertical center line of said planar array to provide a left azimuth sum quantity;

    means for providing the difference and sum of said right and left azimuth sum quantities;

    means for generating the ratio of the azimuth difference and sum, said ratio indicating the degrees that the center of the incident energy beam is off-center in azimuth from the predetermined vertical center line;

    means for summing the signal quantities for all the receiver elements above a predetermined horizontal center line of said planar array to provide an above elevation sum quantity;

    means for summing the signal quantities for all the receiver elements below a predetermined horizontal center line of said planar array to provide a below elevation sum quantity;

    means for providing the difference and sum of said above and below elevation sum quantities; and

    means for generating the ratio of the elevation difference and sum, said ratio indicating the degrees that the center of the incident energy beam is off-center in elevation from the predetermined horizontal center line.

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