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

Patent metadata

Field	Value
Publication number	US-11380995-B2
Application number	US-201916517248-A
Country	US
Kind code	B2
Filing date	Jul 19, 2019
Priority date	Jan 22, 2017
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

The present disclosure provides a two-dimensional antenna system. The two-dimensional antenna system includes a transmitting antenna array and a receiving antenna array. The transmitting antenna array includes one or more circularly polarized transmitting antennas having a first direction of rotation. The receiving antenna array includes two or more first circularly polarized receiving antennas having a second direction of rotation arranged in a first direction, and two or more second circularly polarized receiving antennas having the second direction of rotation arranged in a second direction. The first direction is perpendicular to the second direction, and the first direction of rotation is opposite to the second direction of rotation.

First claim

What is claimed is:

1. A two-dimensional antenna system, comprising:
a transmitting antenna array configured to transmitting a detection wave including:
one or more circularly polarized transmitting antennas having a first direction of rotation; and

a receiving antenna array including:
two or more first circularly polarized receiving antennas having a second direction of rotation arranged in a first direction, the two or more first circularly polarized receiving antennas being configured to receive two or more beams of a first echo of the detection wave, wherein 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 are used to determine a pitch angle of a target; and
two or more second circularly polarized receiving antennas having the second direction of rotation arranged in a second direction, the first direction being perpendicular to the second direction, the first direction of rotation being opposite to the second direction of rotation, and the two or more second circularly polarized receiving antennas being configured to receive two or more beams of a second echo of the detection wave, wherein 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 are used to determine a yaw angle of the target.

2. The system of claim 1 , wherein the transmitting antenna array includes two or more of the circularly polarized transmitting antennas, and the circularly polarized transmitting antennas are arranged in the first direction.

3. The system of claim 1 , wherein the first direction of rotation is a left-handed rotation and the second direction of rotation is a right-handed rotation; or the first direction of rotation is the right-handed rotation and the second direction of rotation is the left-handed rotation.

4. The system of claim 1 , wherein the first direction is a vertical direction.

5. The system of claim 1 , wherein the transmitting antenna array includes two circularly polarized transmitting antennas arranged in a vertical direction; and the receiving antenna array includes two first circularly polarized receiving antennas arranged in the vertical direction, and two second circularly polarized antennas arranged in a horizontal direction.

6. 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.

7. The method of claim 6 , wherein transmitting the detection wave using one or more circularly polarized transmitting antennas having the first direction of rotation includes: transmitting the detection wave by using two or more circularly polarized transmitting antennas arranged in the first direction.

8. The method of claim 7 , wherein the first direction is a vertical direction, and transmitting the detection wave by using two or more circularly polarized transmitting antennas arranged in the first direction includes:
adjusting a direction of the detection wave in a pitch direction by using two or more of the circularly polarized transmitting antennas arranged in the vertical direction.

9. The method of claim 6 , wherein the first direction of rotation is a left-handed rotation and the second direction of rotation is a right-handed rotation; or the first direction of rotation is the right-handed rotation and the second direction of rotation is the left-handed rotation.

10. The method of claim 6 , wherein determining the pitch angle of the target based on the phase difference between the two or more beams of the first echo and the distance between the two or more first circularly polarized receiving antennas includes:
determining the pitch angle of the target by using a double-channel angle measurement method based on the phase difference between the two or more beams of the first echo and the distance between the two or more first circularly polarized receiving antennas; and,
wherein determining the yaw angle of the target based on the phase difference between the two or more beams of the second echo and the distance between the two or more second circularly polarized receiving antennas includes:
determining the yaw angle of the target by using the double-channel angle measurement method based on the phase difference between the two or more beams of the second echo and the distance between the two or more second circularly polarized receiving antennas.

11. The method of claim 6 , further comprising:
determining a distance of the target based on the detection wave and one or more beams of echoes, the one or more beams of echoes being from the two or more beams of the first echo and the two or more beams of the second echo; and
obtaining position information of the target based on the pitch angle, the yaw angle, and the distance.

12. The method of claim 11 , further comprising:
performing the method periodically to obtaining a plurality of positional information of the target within a plurality of cycles.

13. 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.

14. The device of claim 13 , wherein the transmitting antenna array i

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Zou Xiaying
• Peng Xueming
• Gu Qiang
• Huang Han

Classifications

• G01S13/06

  Systems determining position data of a target · CPC title

• H01Q21/28

  Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} · CPC title

• H01Q21/065 Primary

  Patch antenna array · CPC title

• H01Q1/28

  Adaptation for use in or on aircraft, missiles, satellites, or balloons · CPC title

• H01Q3/36

  with variable phase-shifters · CPC title