GENERATING A PLANE WAVE IN THE NEAR FIELD WITH A PLANAR ARRAY ANTENNA

摘要

This article presents a method of generating an approximate plane wave in the near field using a planar phased array antenna. Optimized complex array weights are found using a genetic algorithm and a least squares solution. The genetic algorithm (GA) proves to be a more practical approach than the least squares solution. Computer results with the GA show that the synthesized approximate plane wave has significantly lower field variations over a desired plane wave region in the near field than an equivalent uniform array.