Patent ID: 7499727
Filing Date: 2009-03-03
Classification: H04B

Abstract:
1. A wireless-communication apparatus comprising a feed antenna element, a plurality of no-feed antenna elements, and a plurality of variable reactance units respectively connected to the plurality of no-feed antenna elements, and controlling directivity of an antenna by adjusting the plurality of variable reactance units, comprising: an adjustment unit performing perturbation control so that each period to temporarily change reactance of each of the plurality of variable reactance units is shorter than a period in which the perturbation control is not performed for any of the plurality of variable reactance units, wherein the wireless-communication apparatus controls the directivity of the antenna on the basis of received signals respectively received in the period in which the perturbation control is not performed for any of the plurality of variable reactance units and a period in which the perturbation control provides perturbation.