Patent ID: 6040799
Filing Date: 2000-03-21
Classification: G01S,H01Q

Abstract:
A beam steering antenna unit comprising:direction detection means for detecting the direction of the broadcast tower which is releasing the electric wave currently being received based on the objective broadcast station data obtainable from the tuner, broadcast tower position data obtainable from the broadcast tower data base, and the present position information obtainable from the receiver of GPS in receiving the FM or AM band, TV band, etc.;an antenna directivity determining means for determining the directivity of the antenna based on the direction detected by the direction detecting means; anda directivity variable operation means for varying the directivity of the antenna based on the information on the directivity of the antenna determined by the antenna directivity determining means;said directivity variable operation means comprising:an antenna element selecting means for selecting a plurality of antenna elements existing at specified positions out of the plural non-directivity antenna elements arrayed in a specified pitch based on the information on the directivity of antenna and combine; anda phase relation determining means for variably determining the phase relations between the RF signals of each band received with the above antenna element selected by the antenna element selecting means based on the information on the directivity of antenna.