Patent ID: 9356812
Filing Date: 2016-05-31
CPC Classification: H01Q,H03F,H04B,H04L

Claim Text:
1. A wireless communication apparatus comprising: a plurality of antennas; a receiver that performs diversity reception using the plurality of antennas; a transmitter that outputs a signal; a selector circuit that is connected to the plurality of antennas; a divider located in a transmission line which connects the selector circuit to the transmitter, wherein the divider distributes the signal outputted from the transmitter to the plurality of antennas during transmission of the signal; a phase shifter that is located in at least one of a plurality of transmission lines, each of which connects the divider to a corresponding one of the plurality of antennas, wherein the phase shifter generates a phase difference between the signal distributed to one of the plurality of antennas and the signal distributed to another one of the plurality of antennas through shifting of at least one of a phase of the signal distributed to the one of the plurality of antennas and a phase of the signal distributed to the another one of the plurality of antennas by a corresponding phase shift amount; a controller that is mounted on a vehicle and controls the corresponding phase shift amount, which is shifted by the phase shifter; a communication-type determination device that determines which one of vehicle-to-vehicle communication and vehicle-to-road-side communication is performed through the plurality of antennas; and a memory that stores a preset phase shift amount for the vehicle-to-vehicle communication, and a preset phase shift amount for the vehicle-to-road-side communication, wherein: when the communication-type determination device determines that the vehicle-to-vehicle communication is performed, the controller reads the preset phase shift amount for the vehicle-to-vehicle communication from the memory and sets the preset phase shift amount for the vehicle-to-vehicle communication as the corresponding phase shift amount; and when the communication-type determination device determines that the vehicle-to-road-side communication is performed, the controller reads the preset phase shift amount for the vehicle-to-road-side communication from the memory and sets the preset phase shift amount for the vehicle-to-road-side communication as the corresponding phase shift amount.