UWB antenna module for AOA positioning

Abstract

A UWB antenna module for AOA positioning comprises: a horizontal PCB; the vertical PCB board is arranged on the horizontal PCB board; the first antenna and the second antenna are monopole antennas and are arranged on the vertical PCB side by side along the horizontal direction; wherein the first antenna and the second antenna are vertically polarized antennas, and the angle difference between the phase center of the first antenna and the phase center of the second antenna is smaller than 180 degrees, so that the phase requirement of 2D positioning is met. Through the layout of the two monopole antennas, the omnidirectional antenna design with high isolation and high cross polarization ratio is realized, and 2D positioning can be realized in a 180-degree range.

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, 180-degree positioning. Background Technology

[0002] UWB positioning technology is increasingly used in consumer electronics and automotive fields, achieving high-precision positioning through the AOA algorithm. However, integrating antennas onto UWB antenna modules to achieve 2D, 180-degree 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 invention is to overcome the defects in the above-mentioned background technology and provide a UWB antenna module for AOA positioning that can achieve 2D positioning within a 180-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] A vertical PCB board is mounted on the horizontal PCB board;

[0009] The first and second antennas are monopole antennas, which are arranged side by side on the vertical PCB board in the horizontal direction.

[0010] Both the first antenna and the second antenna are vertically polarized antennas, and the angle difference between the phase centers of the first antenna and the second antenna is less than 180° to meet the phase requirements of 2D positioning.

[0011] Furthermore, the first antenna and the second antenna are T-shaped antennas, L-shaped antennas, or linear antennas.

[0012] Furthermore, both the first antenna and the second antenna are disposed on the surface or inner layer of the vertical PCB board.

[0013] Furthermore, the center distance between the first antenna and the second antenna is less than 0.5 wavelengths, and the isolation is greater than 15dB.

[0014] Furthermore, the first antenna and the second antenna are symmetrical to achieve the same phase.

[0015] Furthermore, the first antenna and the second antenna are fed on the horizontal PCB board.

[0016] Furthermore, the feed positions of the first antenna and the second antenna are connected to the control module via coaxial lines or microstrip lines.

[0017] Furthermore, the line lengths from the first antenna and the second antenna to the control module are kept equal so that the initial phase of each antenna is the same.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a UWB antenna module for AOA (Optical Area of ​​Target) positioning. Through the arrangement of two monopole antennas, it achieves a high-isolation, high-cross-polarization-ratio omnidirectional antenna design, enabling 2D positioning within a 180-degree range. The miniaturized array design of the multiple antennas ensures that the phase center distance between the antennas meets the phase requirements for 180-degree positioning, enabling accurate 2D positioning of the AOA. The two antennas are respectively mounted on a vertical PCB board, and through reasonable layout and power supply design, high isolation and phase consistency between the antennas are ensured. The advantages of this invention lie in the miniaturized design and ingenious layout of the dual antennas, making it applicable to multiple technical fields such as automotive, consumer electronics, and the Internet of Things. Attached Figure Description

[0020] 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.

[0021] Figure 2 This is a positioning diagram of the UWB antenna module used for AOA positioning according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the S11 parameters of the antenna.

[0023] Figure 4 This is a schematic diagram showing the isolation between antennas.

[0024] Figure 5 This is the horizontal radiation pattern of a T-shaped antenna. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See Figure 1 and Figure 2 This utility model provides a UWB antenna module for AOA positioning, comprising: a horizontal PCB board 4; a vertical PCB board 3 mounted on the horizontal PCB board 4; a first antenna 1 and a second antenna 2, both monopole antennas, arranged side-by-side horizontally on the vertical PCB board 3; wherein the first antenna 1 and the second antenna 2 are both vertically polarized antennas, and the angle difference between the phase centers of the first antenna 1 and the second antenna 2 is less than 180° to meet the phase requirements of 2D positioning. Through this structural design, the module achieves miniaturized, high-isolation, and high-performance 2D positioning functionality. The arrangement of two monopole antennas achieves a high-isolation, high-cross-polarization-ratio omnidirectional antenna design, enabling 2D positioning within a 180-degree range.

[0030] like Figure 2As shown, with the horizontal PCB board 4 as the base plane, points A and B receive signals emitted by point signal sources C or D. They will have different phases. The position of the signal source can be deduced by the difference between these two phases, hence it is defined as a 2D-180 degree antenna.

[0031] In some embodiments, the first antenna 1 and the second antenna 2 may be a T-shaped antenna, an L-shaped antenna, or a line antenna.

[0032] In a preferred embodiment, the first antenna 1 and the second antenna 2 are symmetrical to achieve the same phase.

[0033] In some embodiments, the first antenna 1 and the second antenna 2 are both disposed on the same side of the vertical PCB board 3, or a portion of the antenna is embedded in the inner layer of the PCB.

[0034] In a preferred embodiment, the center distance between the first antenna 1 and the second antenna 2 is less than 0.5 wavelengths, and the isolation is greater than 15dB.

[0035] In some embodiments, the feed positions of the first antenna 1 and the second antenna 2 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.

[0036] 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 and the second antenna 2 and is used to control the reception and transmission of signals, as well as to process the AOA algorithm to achieve 2D positioning.

[0037] This invention discloses a UWB antenna module for AOA positioning, comprising a horizontal PCB board and a vertical PCB board. The first and second antennas are monopole antennas, arranged side-by-side horizontally on the vertical PCB board. Both antennas are vertically polarized, with an angle difference of less than 180° between their phase centers to meet the phase requirements of 2D positioning. Through this structural design, the module achieves miniaturized, highly isolated, and high-performance 2D positioning functionality.

[0038] Performance testing

[0039] 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 5The 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.

[0040] The advantages of this invention lie in its miniaturized design and ingenious layout of dual antennas, making it suitable for multiple technical fields such as automotive, consumer electronics, and the Internet of Things, and it has broad application prospects.

[0041] 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; A vertical PCB board is mounted on the horizontal PCB board; The first and second antennas are monopole antennas, which are arranged side by side on the vertical PCB board in the horizontal direction. Both the first antenna and the second antenna are vertically polarized antennas, and the angle difference between the phase centers of the first antenna and the second antenna is less than 180° to meet the phase requirements of 2D positioning.

2. The UWB antenna module for AOA positioning as described in claim 1, characterized in that, The first antenna and the second 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, Both the first antenna and the second antenna are disposed on the surface or inner layer of the vertical PCB board.

4. The UWB antenna module for AOA positioning as described in any one of claims 1 to 3, characterized in that, The center distance between the first antenna and the second 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 4, 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 5, 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 6, characterized in that, The feed positions of the first antenna and the second antenna are connected to the control module via coaxial lines or microstrip lines.

8. The UWB antenna module for AOA positioning as described in any one of claims 1 to 7, characterized in that, The line lengths from the first antenna and the second antenna to the control module are kept equal so that the initial phase of each antenna is the same.

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