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Method and system for forming desired radiation pattern with array antenna

  • US 5,081,463 A
  • Filed: 12/27/1989
  • Issued: 01/14/1992
  • Est. Priority Date: 04/13/1989
  • Status: Expired due to Term
First Claim
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1. An antenna system comprising:

  • a plurality of antenna elements arranged on a curved surface;

    an amplitude distribution arithmetical means for computing an amplitude distribution for supplying to said antenna elements in order to obtain a desired resultant radiation pattern from the combination of said antenna elements; and

    an amplitude controlling means for adjusting the amplitude of signals transmitted from or received by said antenna elements in accordance with the amplitude distribution computed by said amplitude distribution arithmetical means,said amplitude distribution arithmetical means including means for calculating an initial amplitude distribution for each of said antenna elements on the basis of the projection of said antenna elements on a plane perpendicular to the main beam direction of the resultant radiation pattern; and

    a compensation means for compensating the initial amplitude distribution for the effect of the density distribution of said antenna elements projected on a plane, by multiplying the initial amplitude distribution of each antenna element i with a weight factor Wi, where said weight factor Wi =cos δ

    i, where δ

    i represents the angle between the antenna element i and the direction of beam scanning.

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