Two-dimensional antenna system and method and device for positioning a target

A method of positioning a target, comprising:

• transmitting a detection wave by using one or more circularly polarized transmitting antennas having a first direction of rotation;
• receiving two or more beams of a first echo of the detection wave by using two or more first circularly polarized receiving antennas having a second direction of rotation arranged in a first direction;
• receiving two or more beams of a second echo of the detection wave by using two or more second circularly polarized receiving antennas having the second direction of rotation arranged in a second direction, wherein the first direction is perpendicular to the second direction, and the first direction of rotation is opposite to the second direction of rotation;
• determining a pitch angle of the target based on a phase difference between the two or more beams of the first echo and a distance between the two or more first circularly polarized receiving antennas;
• and
• determining a yaw angle of the target based on a phase difference between the two or more beams of the second echo and a distance between the two or more second circularly polarized receiving antennas.

A device for positioning a target, comprising:

• a transmitting antenna array, a receiving antenna array, and one or more processors;
• wherein the transmitting antenna array includes one or more circularly polarized transmitting antennas having a first direction of rotation for transmitting a detection wave;
• the receiving antenna array includes two or more first circularly polarized receiving antennas, the two or more first circularly polarized receiving antennas are antennas having a second direction of rotation arranged in a first direction for receiving two or more beams of a first echo of the detection wave;
• and two or more second circularly polarized receiving antennas, the two or more second circularly polarized receiving antennas are antennas having the second direction of rotation arranged in a second direction for receiving two or more beams of a second echo of the detection wave, the first direction being perpendicular to the second direction, and the first direction of rotation being opposite to the second direction of rotation;
• and
• the one or more processors are configured to determine a pitch angle of the target based on a phase difference between the two or more beams of the first echo and a distance between the two or more first circularly polarized receiving antennas, and to determine a yaw angle of the target based on a phase difference between the two or more beams of the second echo and a distance between the two or more second circularly polarized receiving antennas.