Fast phase-only pattern nulling for large phased array antennas

Abstract

This paper presents two new methods for fast computation of phase-only weights for forming large sector nulls with phased array antennas. Both methods are faster than a previously described method. An example case demonstrates that the computation time can be reduced by a factor of 10 or 100 with the new methods over the previous method. No restrictions are placed on array geometry, element spacing, or sector null shape by the methods. The methods are not subject to trapping in local minimums as are other phase-only methods.