Patent ID: 11940522
Assignee: DENSO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. An antenna apparatus comprising:
a transmission-reception antenna unit that includes
a plurality of transmission antennas along a predetermined array direction, and
a plurality of reception antennas along the array direction,
the plurality of transmission antennas and the plurality of reception antennas forming a virtual array in which a plurality of virtual reception antennas are arranged along the array direction;

an object detecting unit that is configured to detect an object that reflects transmission signals that are transmitted from the plurality of transmission antennas, based on a plurality of virtual reception signals that are received by the plurality of virtual reception antennas;
a transmission phase difference calculating unit that is configured to calculate a transmission phase difference between the plurality of transmission antennas of the transmission signals that are transmitted from the plurality of transmission antennas, based on the plurality of virtual reception signals;
a reception phase difference calculating unit that is configured to calculate a reception phase difference between the plurality of reception antennas of reception signals that are received by the plurality of reception antennas, based on the plurality of virtual reception signals;
a transmission-reception phase difference calculating unit that is configured to calculate a transmission-reception phase difference that is a difference between the transmission phase difference that is calculated by the transmission phase difference calculating unit and the reception phase difference that is calculated by the reception phase difference calculating unit; and
a phase ghost determining unit that is configured to determine that the object that is detected by the object detecting unit is a ghost, in response to the transmission-reception phase difference that is calculated by the transmission-reception phase difference calculating unit being greater than a predetermined phase threshold.