A positioning antenna

Abstract

This application provides a positioning antenna, relating to the field of positioning technology, including a circuit board and a motherboard. Multiple antennas, all omnidirectional, are mounted on the circuit board and connected to the motherboard. The antennas are positioned perpendicular to the circuit board, with their vertical height being one-quarter of the UWB center frequency. This omnidirectional antenna configuration enables 360-degree omnidirectional signal reception. Furthermore, by setting the antenna's vertical height (H) to one-quarter of the UWB center frequency, the positioning antenna achieves optimal reflection characteristics and impedance matching, improving its radiation efficiency and reception performance. It also enhances the antenna's anti-interference capability, thus improving its overall performance. This application further separates the antenna from the motherboard via the circuit board, enabling a modular design and compatibility with various motherboards for application in diverse scenarios.

Description

Technical Field

[0001] This application relates to the field of positioning technology, specifically to a positioning antenna. Background Technology

[0002] With the development of science and technology, it is necessary to locate and track certain objects in real life. In addition to camera tracking and optical measurement, electromagnetic waves can also be used to measure and track the position and distance of objects, such as GPS positioning that we often use.

[0003] However, GPS may not function properly or may have significant errors indoors or in other complex environments. For applications requiring high-precision, dynamic positioning, UWB (Ultra Wideband) positioning technology is needed. This technology can determine the precise location of a device, indicating whether it is stationary or moving. Traditional UWB positioning antennas use directional antennas, which can only receive signals in specific areas, limiting their application scenarios and failing to meet current needs. Utility Model Content

[0004] The purpose of this application is to provide a positioning antenna that can achieve 360-degree omnidirectional signal reception, and has high radiation efficiency and reception performance.

[0005] In one aspect of this application, a positioning antenna is provided, including a circuit board and a main board. The circuit board is provided with a plurality of antennas, all of which are omnidirectional antennas. The antennas are connected between the circuit board and the main board. The antennas are arranged perpendicular to the circuit board, and the height of the antennas in the vertical direction is one-quarter wavelength of the UWB center frequency.

[0006] Optionally, in the plurality of antennas, the spacing between any two antennas is half the wavelength of the UWB center frequency.

[0007] Optionally, a microstrip line is also provided on the circuit board for each of the antennas, and the antennas are connected to the motherboard via the microstrip line on the circuit board for radio frequency communication.

[0008] Optionally, the multiple antennas have the same polarization, which is either vertical polarization or linear polarization.

[0009] Optionally, the number of the plurality of antennas is three, and the line connecting the phase centers of the three antennas forms an equilateral triangle.

[0010] Optionally, the antenna is an ultra-wideband monopole antenna of 6GHz to 9GHz.

[0011] Optionally, the multiple antennas are connected to the circuit board, and the circuit board is connected to the motherboard, through a solder layer.

[0012] Optionally, the antenna is a cylinder or a cone.

[0013] Optionally, the antenna is made of copper or tin-plated aluminum.

[0014] Optionally, the height of the antenna in the vertical direction is between 7mm and 12mm, and the spacing between any two antennas is between 16mm and 22mm.

[0015] The positioning antenna provided in this application adopts an omnidirectional antenna design, enabling 360-degree all-around signal reception. Furthermore, because the antenna's height H in the vertical direction is set to a quarter wavelength of the UWB center frequency, the positioning antenna achieves optimal reflection characteristics and impedance matching, thereby improving its radiation efficiency and reception performance. It also enhances the positioning antenna's anti-interference capability, ultimately improving its overall performance. This application further separates the antenna from the main board via a circuit board, achieving a modular design that is compatible with various main board applications for diverse and suitable scenarios. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the positioning antenna structure provided in an embodiment of this application; Figure 2 This is a schematic diagram of the positioning antenna structure provided in an embodiment of this application; Figure 3 This is a schematic diagram of the positioning antenna structure provided in an embodiment of this application.

[0018] Icons: 10, 110, 120, 130 - Antenna; 20 - Circuit board; 30 - Microstrip line; 40 - Mainboard; H - Vertical direction. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0020] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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 application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Please refer to Figure 1 As shown, this application embodiment provides a positioning antenna, including: a circuit board 20 and a main board 40. The circuit board 20 is provided with a plurality of antennas 10, all of which are omnidirectional antennas 10. The antennas 10 are connected to the main board 40 via radio frequency. The antennas 10 are arranged perpendicular to the circuit board 20, and the height of the antennas 10 along the vertical direction H is one-quarter wavelength of the UWB center frequency.

[0023] An antenna 10 is mounted on circuit board 20, and the two are integrated and then connected to the main board 40. The antenna 10, circuit board 20, and main board 40 achieve wireless communication through a signal generation-transmission-radiation process. The main board 40 transmits electrical signals to the antenna 10 through conductive lines on circuit board 20, and the antenna 10 then converts them into electromagnetic waves and radiates them into space. The receiving process is the reverse: the antenna 10 captures electromagnetic waves and transmits them to the main board 40 through circuit board 20 for processing.

[0024] This application has multiple antennas 10, all of which are omnidirectional antennas 10. The omnidirectional antenna 10 exhibits a beamwidth of a certain width in the vertical direction H, with a large coverage area. The omnidirectional antenna 10 can transmit and receive signals in the horizontal direction of 360 degrees, enabling the positioning antenna of this application to achieve 360-degree positioning function in the horizontal plane.

[0025] Antenna 10 is positioned perpendicular to circuit board 20, and the height of antenna 10 along the vertical direction H is one-quarter of the wavelength of the UWB center frequency.

[0026] The central axis of antenna 10 is perpendicular to circuit board 20. Antenna 10 is an omnidirectional antenna, therefore, the beamwidth of the vertically positioned antenna 10 makes it easier to achieve a large coverage area. For example, in this application, the height H of antenna 10 in the vertical direction is one-quarter wavelength of the UWB center frequency. In a UWB system, using a half-wavelength spacing between antennas 10 can improve the overall performance of the system, including signal transmission distance, anti-interference capability, and energy efficiency, which helps to achieve more reliable communication and higher positioning accuracy.

[0027] When an electromagnetic wave is reflected at the end of antenna 10, the reflected wave interacts with the incident wave. When the height of antenna 10 in the vertical direction H is one-quarter wavelength of the UWB center frequency, the reflected wave will be completely out of phase with the incident wave (180 degrees out of phase) when it returns to the beginning of antenna 10, thus matching the phase of the reflection.

[0028] Furthermore, the impedance of antenna 10 needs to be matched with the impedance of the transmission line to ensure efficient signal energy transmission. When the height H of antenna 10 in the vertical direction is one-quarter wavelength of the UWB center frequency, a high impedance can be formed at the end of antenna 10 and a low impedance at the beginning of antenna 10, thereby achieving good impedance matching.

[0029] Therefore, setting the height of antenna 10 in the vertical direction H to a quarter wavelength of the UWB center frequency achieves optimal reflection characteristics and impedance matching, thereby improving the radiation efficiency and receiving performance of antenna 10. Furthermore, it is simple to set up, efficient, and suitable for various application scenarios.

[0030] Furthermore, various electromagnetic wave signals exist in real life, making traditional positioning technologies susceptible to environmental interference. Currently, UWB technology boasts strong bandwidth and anti-interference capabilities. Setting the height H of antenna 10 in the vertical direction to a quarter wavelength of the UWB center frequency can also enhance the anti-interference capability of antenna 10 to some extent.

[0031] For example, such as Figure 3 As shown, the height of antenna 10 in the vertical direction H is generally 7mm~12mm.

[0032] Therefore, the positioning antenna provided in this application adopts an omnidirectional antenna 10 configuration, enabling 360-degree omnidirectional signal reception. Furthermore, since the height H of the antenna 10 in the vertical direction is set to a quarter wavelength of the UWB center frequency, the positioning antenna achieves optimal reflection characteristics and impedance matching, thereby improving the radiation efficiency and reception performance of the antenna 10, enhancing its anti-interference capability, and ultimately improving its overall performance. This application also separates the antenna 10 from the main board 40 via a circuit board 20, achieving a modular design that is compatible with various applications of different main boards 40, allowing for application in a variety of suitable scenarios.

[0033] Furthermore, among the multiple antennas 10, the spacing between any two antennas 10 is half the wavelength of the UWB center frequency.

[0034] When the spacing between antennas 10 is less than one wavelength, the signals between antennas 10 will interfere with each other, leading to a degraded signal quality. However, setting the spacing to half a wavelength can reduce this interference and improve signal quality. Furthermore, at a half-wavelength spacing, the phase relationship between the two antennas 10 is fixed, which helps maintain signal coherence and stability.

[0035] For example, the spacing between two antennas 10 is generally between 16mm and 22mm.

[0036] In summary, setting the spacing between the two antennas 10 to half the wavelength of the UWB center frequency can effectively reduce signal interference, optimize phase relationship, and improve radiation efficiency, thereby enhancing the performance of the entire system.

[0037] Each antenna 10 on the circuit board 20 is also provided with a microstrip line 30, and the antenna 10 is connected to the main board 40 through the microstrip line 30 of the circuit board 20.

[0038] Antenna 10 and motherboard 40 are connected via microstrip line 30 on circuit board 20 for radio frequency (RF) connection. In addition to RF connection, microstrip line 30 on circuit board 20 also serves as an impedance matcher for antenna 10, bringing the input impedance of antenna 10 close to 50 ohms and improving antenna 10 performance.

[0039] Specifically, the microstrip line 30 is a transmission line structure used to transmit signals in high-frequency circuits. Positioning antennas employing the microstrip line 30 can achieve a wide operating bandwidth, meeting the needs of various communication systems. Furthermore, they are small in size, lightweight, and easy to integrate into various devices.

[0040] Furthermore, since the microstrip line 30 uses common printed circuit board materials and technologies, the manufacturing process of the positioning antenna is relatively simple, thus reducing the manufacturing cost of the positioning antenna.

[0041] Furthermore, the multiple antennas 10 have the same polarization, which is either vertical polarization or linear polarization.

[0042] When multiple antennas 10 have the same polarization, they will have identical polarization characteristics during signal transmission. This means that the electric field vectors of these antennas 10 will maintain a consistent direction when receiving and transmitting signals, resulting in better signal matching and transmission efficiency. Especially in the case of vertical polarization, the installation location and environment of the antenna 10 can affect its performance. For example, a vertically polarized antenna 10 installed near a sidewall will perform closer to its nominal polarization performance.

[0043] In the examples of this application, such as Figure 2 As shown, there are three antennas 10, namely antenna 110, antenna 120 and antenna 130. The line connecting the phase centers of these three antennas 10 forms an equilateral triangle.

[0044] The phase centers of the three antennas 10 form an equilateral triangle, meaning that each phase center is equidistant from the other two phase centers. Due to the symmetry of the equilateral triangle, the radiation modes of the three antennas 10 may superimpose to form a symmetrical radiation field.

[0045] If the phase centers of the three antennas 10 are synchronized in phase, their radiated signals may form an interference effect in space, enhancing or weakening the signal strength in certain directions. This can be configured as needed, for example, in scenarios requiring uniform coverage or signal enhancement in specific directions.

[0046] Antenna 10 is an ultra-wideband monopole antenna 10 of 6GHz~9GHz. Existing positioning technologies use electromagnetic waves with lower frequencies. Due to the larger wavelength, the positioning accuracy can no longer meet the current usage requirements. The positioning antenna of this application uses an ultra-wideband monopole antenna 10 of 6GHz~9GHz, which can meet the usage requirements of high frequency and small wavelength.

[0047] In addition, multiple antennas 10 are connected to the circuit board 20, and the circuit board 20 is connected to the motherboard 40 through a solder layer.

[0048] Welding technology is used to weld the connection points between antenna 10 and circuit board 20, and between circuit board 20 and main board 40. Welding can ensure the reliability of electrical connections and mechanical stability.

[0049] In the example of this application, antenna 10 is cylindrical or conical. Cylindrical or conical antenna 10 can have a larger octave bandwidth, which can improve the transmission rate of antenna 10.

[0050] For example, when the antenna 10 is a cylinder, its diameter is between 2mm and 5mm.

[0051] In addition, the antenna 10 of this application is made of copper or tin-plated aluminum.

[0052] Tin-plated aluminum exhibits the same conductivity as pure copper wire when transmitting high-frequency signals (5MHz). Both copper and tin-plated aluminum materials possess excellent solderability, which remains good over time, allowing for long-term storage and extending the service life of positioning antennas.

[0053] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A positioning antenna, characterized in that, include: The circuit board and the motherboard are provided. The circuit board is provided with multiple antennas, all of which are omnidirectional antennas. The antennas are connected between the circuit board and the motherboard. The antennas are arranged perpendicular to the circuit board, and the height of the antennas in the vertical direction is one-quarter wavelength of the UWB center frequency.

2. The positioning antenna according to claim 1, characterized in that, In the plurality of antennas, the spacing between any two antennas is half the wavelength of the UWB center frequency.

3. The positioning antenna according to claim 1, characterized in that, Each antenna on the circuit board is also provided with a microstrip line, and the antenna and the motherboard are connected by radio frequency through the microstrip lines on the circuit board.

4. The positioning antenna according to claim 1, characterized in that, The multiple antennas described herein have the same polarization, which is either vertical or linear polarization.

5. The positioning antenna according to claim 1, characterized in that, The number of the multiple antennas is three, and the line connecting the phase centers of the three antennas forms an equilateral triangle.

6. The positioning antenna according to claim 1, characterized in that, The antenna is an ultra-wideband monopole antenna with a frequency range of 6 GHz to 9 GHz.

7. The positioning antenna according to any one of claims 1 to 6, characterized in that, The multiple antennas are connected to the circuit board, and the circuit board is connected to the motherboard via a solder layer.

8. The positioning antenna according to any one of claims 1 to 6, characterized in that, The antenna is a cylinder or a cone.

9. The positioning antenna according to any one of claims 1 to 6, characterized in that, The antenna is made of copper or tin-plated aluminum.

10. The positioning antenna according to any one of claims 1 to 6, characterized in that, The height of the antenna in the vertical direction is between 7mm and 12mm, and the spacing between any two antennas is between 16mm and 22mm.

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