ANTENNA APPARATUS AND ANTENNA DIRECTION CONTROL METHOD

摘要

An antenna apparatus includes transmitting elements arranged on a first circle and transmit an electromagnetic wave having OAM, a calibration transmitting element disposed at a center of the first circle and transmits a calibration electromagnetic wave without OAM, at least three calibration receiving elements disposed at regular intervals on a second circle, and a plurality of receiving elements disposed on the second circle or a third circle disposed with the second circle in a concentric fashion, wherein an angle of a central axis of the second circle is adjusted so that phases of the calibration electromagnetic wave received at all of the calibration receiving elements match with each other, and wherein an angle of a central axis of the first circle is adjusted so that phase differences of the electromagnetic wave having OAM received by the two adjacent calibration receiving elements among all of the calibration receiving elements are minimized.

主权项

1. An antenna apparatus comprising:
a plurality of transmitting elements arranged on a circumference of a first circle in a manner that the transmitting elements transmit electromagnetic waves that form an electromagnetic wave having OAM (Orbital Angular Momentum); a calibration transmitting element disposed at a center of the first circle and configured to transmit a calibration electromagnetic wave without OAM; at least three calibration receiving elements disposed at regular intervals on a circumference of a second circle in a state where the calibration receiving elements face toward the transmitting elements and the calibration transmitting element; and a plurality of receiving elements disposed on the circumference of the second circle or a circumference of a third circle disposed with the second circle in a concentric fashion, wherein an angle of a central axis of the second circle is adjusted so that phases of the calibration electromagnetic wave received at all of the calibration receiving elements match with each other in a state where the calibration transmitting element transmits the calibration electromagnetic wave, and wherein an angle of a central axis of the first circle is adjusted so that phase differences of the electromagnetic wave having OAM received by the two adjacent calibration receiving elements among all of the calibration receiving elements become certain values in a state where a plurality of the transmitting elements transmit the electromagnetic waves.