Patent ID: 7453411
Filing Date: 2008-11-18
Classification: G01S,H01Q

Abstract:
1. An antenna device comprising: a rotatable primary radiator that radiates signals in directions different from a rotation axis thereof; and a plurality of reflectors that directly receive the signals radiated from the primary radiator, guide the signals radiated from the primary radiator in a beam transmission direction of the antenna device by reflection, and guide reflected target signals from the beam transmission direction to the primary radiator by reflection, wherein only one reflector of the plurality of reflectors receives the signals radiated from the primary radiator at a time, the primary radiator is positioned such that the rotation axis and the beam transmission direction are substantially aligned with each other, and the radiating direction of the primary radiator is inclined with respect to the rotation axis by an angle of 30° or more, and the plurality of reflectors have shapes that are different from each other.