Patent ID: 8098199

Claim:
An array antenna apparatus comprising a plurality of steerable antennas, each of the plurality of steerable antennas comprising: an radiating antenna element; at least one parasitic antenna element, the parasitic antenna element being located at a side of the radiating antenna element so as to be separated from the radiating antenna element in a direction by a distance, and the parasitic antenna element comprising a first conductor portion and a second conductor portion; at least one pair of rectifier elements provided to the at least one parasitic antenna element, the pair of rectifier elements being provided between the first conductor portion and the second conductor portion, anodes of the rectifier elements being connected to each other, a cathode of a first one of the rectifier elements being connected to the first conductor portion, a cathode of a second one of the rectifier elements being connected to the second conductor portion, and the pair of rectifier elements operating the parasitic antenna element as a reflector when a bias voltage is applied thereto from a controller; control lines connecting the rectifier elements to the controller; and at least two first inductors provided on each of the control lines at predetermined intervals, at portions of the control line being electromagnetically coupled to a steerable antenna other than the steerable antenna comprising the rectifier elements to which the control line is connected, wherein the intervals for providing the at least two first inductors is set to such a length that substantially no resonance occurs in a section of the control line between the first inductors at an operating frequency of the steerable antenna.