Adaptive multibeam antenna array
Abstract
An adaptive multibeam antenna array is considered which will enhance the advantages of a plain one. By providing simultaneous reception of signals from different directions and their sequential processing. The optimization of the array control for maximum interference suppression in the radiation pattern is emphasized. The optimum control is sought with respect to the signaltointerference power ratio as a genaralized criterion. Sampled useful signals and transmission coefficients are found to be complexconjugate quantities, assuming compatible formation of beams, so that synphasal equiamplitude addition of signals from all array element is attainable by unique settings of the weight factors. Calculations are simplified by letting the useful signal power in the 1th beam be approximately equal to the kth weight factor, before optimizing the weight vector for maximum signaltointerference ratio. A narrowband interference described by power P and vector V of signal distribution over the array is considered as an example, to demonstrate the algorithm of synthesis. The algorithm, using the Butler matrix, was executed experimentally on a computer for a linear equidistant antenna array of 32 elements with compatible formation of beams.
 Publication:

USSR Rept Electron Elec Eng JPRS UEE
 Pub Date:
 January 1984
 Bibcode:
 1984RpEEE........3N
 Keywords:

 Antenna Arrays;
 Interference;
 Optimal Control;
 Signal Processing;
 Algorithms;
 Narrowband;
 Weight (Mass);
 Communications and Radar