ADAPTIVE ARRAY ANTENNA

The outputs of antenna elements 111 to 11M of a wide directional pattern 12 are distributed by a distributor 13 to respective channel parts 141 to 14N, and in each channel part 14i (i=1, 2, ..., N), its connection points 311 to 31M to the distributor 14 are divided in groups of P=4; four connecting ends of the respective groups are connected via level-phase regulators 231 to 234 to combiners 221 to 22L (L=M/P), then the combined outputs therefrom are applied to receivers 151 to 15L, and the outputs therefrom are combined after being applied to regulators 161 to 16L which are adaptively controlled. In the channel part 141, coefficients W1 to W4 are set in regulators 231 to 234 to obtain a subarray directional pattern 24 and a combined directional pattern 19 is controlled within the range of the subarray directional pattern, and in another channel part coefficients W5 to W8 are set in the regulators 231 to 234 to obtain a subarray directional pattern 26; by setting the regulators 231 to 234 of each channel part, a wide area is covered as a whole.