A 'Zoom-in' Scanning Array for Wireless Communications

摘要

A small supergain circular array with electronic scanning and "zoom-in" features has been proposed. The array utilizes the orthogonal modes existing in the array systems as bases for beamforming. A mode-decomposition network is proposed that separates the different modes into different circuit ports and matches them individually. Consequentially the modes can be combined to achiever higher gain and directivity than a single antenna with very little increase in the occupied space. The modes can also be combined in a certain fashion to allow electronic scanning. The beamwidth and the gain of the radiation pattern can be controlled according to the order of the modes