UWB antenna module for AOA positioning
By employing a three-group monopole antenna layout in the UWB antenna module, the problem of balancing miniaturization and high performance is solved, achieving 2D omnidirectional positioning with high isolation and phase consistency, which is suitable for automotive and consumer electronics applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FEIRUI INTELLIGENT CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-08
AI Technical Summary
Existing UWB antenna modules struggle to simultaneously achieve miniaturization and high performance when realizing 2D, 360-degree omnidirectional positioning, especially the requirements for phase center consistency and high isolation.
A three-pole antenna layout is adopted, including the first, second, and third antennas on the horizontal and vertical PCB boards. By ensuring that the phase center angle difference of the antennas meets the 360-degree omnidirectional positioning requirements, and connecting them to the control module through coaxial lines or microstrip lines, an omnidirectional antenna design with high isolation and high cross-polarization ratio is achieved.
It achieves 2D omnidirectional positioning within a 360-degree range, ensuring high isolation and phase consistency between antennas, and is suitable for applications such as automotive and consumer electronics.
Smart Images
Figure CN224217703U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to UWB (Ultra-Wideband) positioning technology, and in particular to a UWB antenna module for AOA (Angle of Arrival) positioning, which can achieve 2D, 360-degree omnidirectional positioning. Background Technology
[0002] UWB positioning technology is increasingly used in consumer electronics and automotive fields, achieving high-precision positioning through AOA algorithms. However, integrating antennas onto UWB antenna modules to achieve 2D, 360-degree omnidirectional positioning faces challenges in ensuring phase center consistency, high isolation, and miniaturization. Existing technologies typically require performance compromises, either sacrificing phase center consistency, reducing isolation, or increasing antenna size to meet requirements, but none of these solutions can simultaneously satisfy the demands for miniaturization and high performance.
[0003] It should be noted that the information disclosed in the background section above is only for understanding the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention
[0004] The main purpose of this utility model is to overcome the defects existing in the above-mentioned background technology and provide a UWB antenna module for AOA positioning, which can achieve 2D omnidirectional positioning within a 360-degree range.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A UWB antenna module for AOA positioning includes:
[0007] Horizontal PCB board;
[0008] The first vertical PCB board is mounted on the horizontal PCB board;
[0009] The second vertical PCB board is mounted on the horizontal PCB board and is parallel to the first vertical PCB board;
[0010] The first and second antennas are monopole antennas, which are arranged side by side on the first vertical PCB board in the horizontal direction.
[0011] The third antenna is a monopole antenna, which is mounted on the second vertical PCB board and located horizontally between the first antenna and the second antenna.
[0012] Among them, 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 requirements for 360-degree omnidirectional positioning.
[0013] Furthermore, the first antenna, the second antenna, and the third antenna are T-shaped antennas, L-shaped antennas, or linear antennas.
[0014] Furthermore, the first antenna and the second antenna are disposed on the surface or inner layer of the first vertical PCB board, and the third antenna is disposed on the surface or inner layer of the second vertical PCB board.
[0015] Furthermore, the center distance between the first antenna, the second antenna, and the third antenna is less than 0.5 wavelengths, and the isolation is greater than 15dB.
[0016] Furthermore, the first antenna and the second antenna are symmetrical to achieve the same phase.
[0017] Furthermore, the first antenna and the second antenna are fed on the horizontal PCB board.
[0018] Furthermore, the third antenna is fed onto the horizontal PCB board.
[0019] Furthermore, the feed positions of the first antenna, the second antenna, and the third antenna are connected to the control module via coaxial lines or microstrip lines.
[0020] Furthermore, the line lengths from 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.
[0021] The beneficial effects of this utility model are:
[0022] This invention provides a UWB antenna module for AOA (Optical Oriented Area) positioning. Through a three-monopolar antenna layout, it achieves a high-isolation, high-cross-polarization-ratio omnidirectional antenna design, enabling 2D omnidirectional positioning within a 360-degree range. The miniaturized array design of the multiple antennas ensures that the phase center distance between the antennas meets the phase requirements for 360-degree omnidirectional positioning, enabling accurate 2D AOA positioning. The layout of the three monopolar antennas, each mounted on two vertical PCBs, ensures high isolation and phase consistency between the antennas. The advantages of this invention lie in its miniaturized design and ingenious layout of the multiple antennas, making it suitable for various technical fields such as automotive, consumer electronics, and the Internet of Things. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of a UWB antenna module for AOA positioning according to an embodiment of the present invention.
[0024] Figure 2This is a positioning diagram of the UWB antenna module used for AOA positioning according to an embodiment of the present invention.
[0025] Figure 3 This is a schematic diagram of the S11 parameters of the antenna.
[0026] Figure 4 This is a schematic diagram showing the isolation between antennas.
[0027] Figure 5 This is the horizontal radiation pattern of a T-shaped antenna. Detailed Implementation
[0028] The embodiments of this utility model are described in detail below. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of this utility model.
[0029] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be used for fixing, coupling, or communication.
[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] See Figure 1 and Figure 2This utility model provides a UWB antenna module for AOA positioning, comprising: a horizontal PCB board 4; a first vertical PCB board 5, mounted on the horizontal PCB board 4; a second vertical PCB board 6, mounted on the horizontal PCB board 4 and parallel to the first vertical PCB board 5; a first antenna 1 and a second antenna 2, both monopole antennas, arranged side-by-side horizontally on the first vertical PCB board 5; and a third antenna 3, also a monopole antenna, mounted on the second vertical PCB board 6, positioned horizontally between the first antenna 1 and the second antenna 2. The first antenna 1, the second antenna 2, and the third antenna 3 are all vertically polarized antennas, and the angular difference between the phase centers of the first antenna 1, the second antenna 2, and the third antenna 3 satisfies the phase requirements for 360-degree omnidirectional positioning. Through the arrangement of three monopole antennas, a high isolation and high cross-polarization ratio omnidirectional antenna design is achieved, enabling 2D omnidirectional positioning within a 360-degree range.
[0033] like Figure 2 As shown, with the horizontal PCB board 4 as the base plane, points A, B, and C receive signals emitted by the point signal source D. These signals will have different phases. The position of the signal source can be calculated by the difference between these three sets of phases. The position in all directions within 360 degrees with the base plane as the base can be calculated, so it is defined as a 2D-360 degree antenna.
[0034] In some embodiments, the first antenna 1, the second antenna 2, and the third antenna 3 can be a T-shaped antenna, an L-shaped antenna, or a line antenna.
[0035] In a preferred embodiment, the first antenna 1 and the second antenna 2 are symmetrical to achieve the same phase.
[0036] In some embodiments, the first antenna 1 and the second antenna 2 are disposed on the surface or inner layer of the first vertical PCB board 5, and the third antenna 3 is disposed on the surface or inner layer of the second vertical PCB board 6.
[0037] In a preferred embodiment, the center distance between the first antenna 1, the second antenna 2, and the third antenna 3 is less than 0.5 wavelengths, and the isolation is greater than 15dB.
[0038] In some embodiments, the feed positions of the first antenna 1, the second antenna 2, and the third antenna 3 are connected to the control module via coaxial lines or microstrip lines, and the line lengths are kept equal to ensure that the initial phase of each antenna is the same.
[0039] This utility model embodiment also provides a UWB antenna device, including the UWB antenna module and a control module. The control module is connected to the first antenna 1, the second antenna 2 and the third antenna 3, and is used to control the reception and transmission of signals, as well as to process the AOA algorithm to achieve 2D, 360-degree omnidirectional positioning.
[0040] A UWB antenna module for AOA positioning includes a horizontal PCB board 4 and two vertical PCB boards. The first antenna 1 and the second antenna 2 are monopole antennas, arranged side-by-side horizontally on the first vertical PCB board 5. The third antenna 3 is also a monopole antenna, located on the second vertical PCB board 6, between the first antenna 1 and the second antenna 2. All three antennas are vertically polarized, and the angular difference between their phase centers meets the phase requirements for 360-degree omnidirectional positioning. This structural design enables the module to achieve miniaturized, highly isolated, and high-performance 2D omnidirectional positioning.
[0041] Performance testing
[0042] Figure 3 The S11 parameters of the antenna are given by... Figure 3 As can be seen, the S11 parameters at 8GHz are all below -10dB, indicating excellent input impedance. Figure 4 The isolation between antennas is determined by... Figure 4 The isolation between the visible antennas is less than -15dB, and the mutual interference is very small. Figure 5 The horizontal radiation pattern of the T-type antenna (where the horizontal angle is phi and the radius represents the antenna radiation intensity dBi) is given by... Figure 5 It can be seen that the horizontal plane has good omnidirectionality and is dominated by vertical polarization.
[0043] The advantages of this invention lie in its miniaturized design and ingenious layout of multiple antennas, making it suitable for various technical fields such as automotive, consumer electronics, and the Internet of Things, and it has broad application prospects.
[0044] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.
Claims
1. A UWB antenna module for AOA positioning, characterized in that, include: Horizontal PCB board; The first vertical PCB board is mounted on the horizontal PCB board; The second vertical PCB board is mounted on the horizontal PCB board and is parallel to the first vertical PCB board; The first and second antennas are monopole antennas, which are arranged side by side on the first vertical PCB board in the horizontal direction. The third antenna is a monopole antenna, which is mounted on the second vertical PCB board and located horizontally between the first antenna and the second antenna. Among them, 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 requirements for 360-degree omnidirectional positioning.
2. The UWB antenna module for AOA positioning as described in claim 1, characterized in that, The first antenna, the second antenna, and the third antenna are T-shaped antennas, L-shaped antennas, or linear antennas.
3. The UWB antenna module for AOA positioning as described in claim 1 or 2, characterized in that, The first antenna and the second antenna are disposed on the surface or inner layer of the first vertical PCB board, and the third antenna is disposed on the surface or inner layer of the second vertical PCB board.
4. The UWB antenna module for AOA positioning as described in any one of claims 1 to 2, characterized in that, The center distance between the first antenna, the second antenna, and the third antenna is less than 0.5 wavelengths, and the isolation is greater than 15dB.
5. The UWB antenna module for AOA positioning as described in any one of claims 1 to 2, characterized in that, The first antenna and the second antenna are symmetrical to achieve the same phase.
6. The UWB antenna module for AOA positioning as described in any one of claims 1 to 2, characterized in that, The first antenna and the second antenna are fed on the horizontal PCB board.
7. The UWB antenna module for AOA positioning as described in any one of claims 1 to 2, characterized in that, The third antenna is fed on the horizontal PCB board.
8. The UWB antenna module for AOA positioning as described in any one of claims 1 to 2, characterized in that, The feed positions of the first antenna, the second antenna, and the third antenna are connected to the control module via coaxial lines or microstrip lines.
9. The UWB antenna module for AOA positioning as described in any one of claims 1 to 2, characterized in that, The line lengths from 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.