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CN-224217703-U - UWB antenna module for AOA positioning

CN224217703UCN 224217703 UCN224217703 UCN 224217703UCN-224217703-U

Abstract

The UWB antenna module for AOA positioning comprises a horizontal PCB, a first vertical PCB, a second vertical PCB, a first antenna and a third antenna, wherein the first vertical PCB is arranged on the horizontal PCB, the second vertical PCB is arranged on the horizontal PCB and is parallel to the first vertical PCB, the first antenna and the second antenna are monopole antennas which are arranged on the first vertical PCB side by side along the horizontal direction, the third antenna is a monopole antenna which is arranged on the second vertical PCB and is positioned between the first antenna and the second antenna in the horizontal direction, the first antenna, the second antenna and the third antenna are all vertically polarized antennas, and the phase difference among the phase centers of the first antenna, the second antenna and the third antenna meets the phase requirement of 360-degree omnidirectional positioning. Through the layout of three monopole antennas, the omnidirectional antenna design with high isolation and high cross polarization ratio is realized, and 2D omnidirectional positioning can be realized within a 360-degree range.

Inventors

  • ZHANG QIANG
  • ZOU JIANFENG

Assignees

  • 深圳市飞睿智能有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (9)

  1. 1. A UWB antenna module for AOA positioning, comprising: a horizontal PCB board; The first vertical PCB is arranged on the horizontal PCB; The second vertical PCB is arranged on the horizontal PCB and is parallel to the first vertical PCB; The first antenna and the second antenna are monopole antennas and are arranged on the first vertical PCB side by side along the horizontal direction; The third antenna is a monopole antenna and is arranged on the second vertical PCB and is positioned between the first antenna and the second antenna in the horizontal direction; The first antenna, the second antenna and the third antenna are all vertically polarized antennas, and the angle difference between the phase centers of the first antenna, the second antenna and the third antenna meets the phase requirement of 360-degree omni-directional positioning.
  2. 2. The UWB antenna module for AOA positioning of claim 1 wherein the first, second, third antennas are T-antennas, L-antennas, or in-line antennas.
  3. 3. The UWB antenna module for AOA positioning of claim 1 or 2 wherein the first and second antennas are disposed on a surface or inner layer of the first vertical PCB and the third antenna is disposed on a surface or inner layer of the second vertical PCB.
  4. 4. UWB antenna module for AOA positioning according to any of the claims 1-2, characterized in that the first antenna, the second antenna and the third antenna have a centre distance of less than 0.5 wavelength and an isolation of more than 15dB.
  5. 5. UWB antenna module for AOA positioning according to any of the claims 1 to 2, characterized in that the first antenna and the second antenna are symmetrical to achieve the same phase.
  6. 6. UWB antenna module for AOA positioning according to any of the claims 1-2, characterized in that the first antenna and the second antenna realize a feeding on the horizontal PCB board.
  7. 7. UWB antenna module for AOA positioning according to any of the claims 1-2, characterized in that the third antenna is fed on the horizontal PCB board.
  8. 8. UWB antenna module for AOA positioning according to any of the claims 1-2, characterized in that the feed locations of the first antenna, the second antenna and the third antenna are connected to a control module by means of coaxial or microstrip lines.
  9. 9. A UWB antenna module for AOA positioning according to any of the claims 1 to 2, characterized in that the line lengths of the first, second and third antennas to the control module are kept equal so that the initial phase of each antenna is the same.

Description

UWB antenna module for AOA positioning Technical Field The utility model relates to UWB (ultra wide band) positioning technology, in particular to a UWB antenna module for AOA (angle of arrival) positioning, which can realize 2D and 360-degree omnidirectional positioning. Background UWB positioning technology is increasingly used in consumer electronics and vehicle-mounted applications, and high-precision positioning can be achieved through AOA algorithms. However, integrating antennas on UWB antenna modules to achieve 2D, 360 degree omni-directional positioning faces challenges in ensuring phase center consistency, high isolation, and miniaturized design. The prior art generally needs to compromise performance, either sacrifice phase center consistency or reduce isolation, or meet the requirements by increasing antenna size, but none of these solutions address the requirements of both miniaturization and high performance. It should be noted that the information disclosed in the above background section is only for understanding the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention The utility model aims to overcome the defects in the background art and provide a UWB antenna module for AOA positioning, which can realize 2D omnidirectional positioning within 360 degrees. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A UWB antenna module for AOA positioning, comprising: a horizontal PCB board; The first vertical PCB is arranged on the horizontal PCB; The second vertical PCB is arranged on the horizontal PCB and is parallel to the first vertical PCB; The first antenna and the second antenna are monopole antennas and are arranged on the first vertical PCB side by side along the horizontal direction; The third antenna is a monopole antenna and is arranged on the second vertical PCB and is positioned between the first antenna and the second antenna in the horizontal direction; The first antenna, the second antenna and the third antenna are all vertically polarized antennas, and the angle difference between the phase centers of the first antenna, the second antenna and the third antenna meets the phase requirement of 360-degree omni-directional positioning. Further, the first antenna, the second antenna and the third antenna are T-shaped antennas, L-shaped antennas or linear antennas. Further, the first antenna and the second antenna are arranged on the surface or the inner layer of the first vertical PCB, and the third antenna is arranged on the surface or the inner layer of the second vertical PCB. Further, the first antenna, the second antenna and the third antenna have a center distance of less than 0.5 wavelength and an isolation of greater than 15dB. Further, the first antenna and the second antenna are symmetrical to achieve the same phase. Further, the first antenna and the second antenna realize feeding on the horizontal PCB board. Further, the third antenna realizes feeding on the horizontal PCB board. Further, the feeding positions of the first antenna, the second antenna and the third antenna are connected to the control module through coaxial lines or microstrip lines. Further, the line lengths of the first antenna, the second antenna and the third antenna to the control module are kept equal, so that the initial phase of each antenna is the same. The utility model has the beneficial effects that: The utility model provides an UWB antenna module for AOA positioning, which realizes the design of an omnidirectional antenna with high isolation and high cross polarization ratio through the layout of three monopole antennas and can realize 2D omnidirectional positioning within 360 degrees. Through the miniaturized array design of many antennas, the phase center distance between the antennas satisfies 360 degrees omnidirectional positioning's phase requirement, can accurately carry out the 2D location of AOA. The three monopole antennas are respectively arranged on the layout design of the two vertical PCB boards, so that high isolation and phase consistency between the antennas are ensured. The utility model has the advantages of miniaturized design and ingenious layout of multiple antennas, and is suitable for the technical fields of vehicle-mounted fields, consumer electronics, internet of things and the like. Drawings Fig. 1 is a schematic structural diagram of a UWB antenna module for AOA positioning according to an embodiment of the present utility model. Fig. 2 is a schematic diagram of positioning of a UWB antenna module for AOA positioning according to an embodiment of the present utility model. Fig. 3 is a schematic diagram of S11 parameters of the antenna. Fig. 4 is a schematic diagram of isolation between antennas. Fig. 5 is a horizontal plane pattern of the T-shaped antenna. Detailed Description The following