Bluetooth antenna, positioning device and vehicle

Abstract

The embodiment of the invention relates to a Bluetooth antenna, positioning equipment and a vehicle. The Bluetooth antenna comprises a first radiation branch knot, a second radiation branch knot and a plurality of antenna tuning elements, the first radiation branch knot and the second radiation branch knot are connected with the Bluetooth board through corresponding antenna tuning elements; and the first radiation branch knot and the second radiation branch knot are arranged around the outer edge of the Bluetooth board. According to the Bluetooth antenna, the first radiation branch knot and the second radiation branch knot are connected with the Bluetooth board through the corresponding antenna tuning elements, and the first radiation branch knot and the second radiation branch knot are arranged around the outer edge of the Bluetooth board, so that electromagnetic wave radiation of the Bluetooth antenna can be more uniform through the first radiation branch knot and the second radiation branch knot; therefore, the radiation range of the Bluetooth antenna is balanced, the bandwidth of the antenna is improved, and further, the precision of realizing fixed-point parking by using the Bluetooth antenna is improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of communication technology, and in particular, to a Bluetooth antenna, a positioning device, and a vehicle. Background Art

[0002] With the development of sharing technology, the emergence of shared bicycles and shared electric motorcycles has greatly facilitated people's daily travel. However, the disorderly and irregular parking of shared bicycles and shared electric motorcycles will hinder traffic and affect the overall image of the city.

[0003] In traditional technology, the fixed-point parking of shared bicycles and shared electric motorcycles is realized through Bluetooth positioning technology. However, the traditional method has the problem of low precision of fixed-point parking. Summary of the invention

[0004] The embodiments of the present disclosure provide a Bluetooth antenna, a positioning device and a vehicle, which can be used to improve the accuracy of fixed-point parking through Bluetooth positioning technology.

[0005] In a first aspect, an embodiment of the present disclosure provides a Bluetooth antenna, the Bluetooth antenna comprising: a first radiation branch, a second radiation branch, and a plurality of antenna tuning elements;

[0006] The first radiation branch and the second radiation branch are connected to the Bluetooth board through corresponding antenna tuning elements; and the first radiation branch and the second radiation branch are both arranged around the outer edge of the Bluetooth board.

[0007] In a second aspect, an embodiment of the present disclosure provides a positioning device, wherein the positioning device includes the Bluetooth antenna as described in the first aspect.

[0008] In a third aspect, an embodiment of the present disclosure provides a vehicle, wherein the vehicle includes the positioning device as described in the second aspect.

[0009] The embodiments of the present disclosure provide a Bluetooth antenna, a positioning device and a vehicle, wherein the Bluetooth antenna includes a first radiation branch, a second radiation branch and a plurality of antenna tuning elements. Since the first radiation branch and the second radiation branch are connected to the Bluetooth board through corresponding antenna tuning elements, and the first radiation branch and the second radiation branch are both arranged around the outer edge of the Bluetooth board, the electromagnetic waves of the Bluetooth antenna can be radiated more evenly through the first radiation branch and the second radiation branch, thereby balancing the radiation range of the Bluetooth antenna and improving the antenna bandwidth. Furthermore, since the radiation range of the Bluetooth antenna is more even and the accuracy of the Bluetooth signal is higher, when the Bluetooth antenna is used to achieve fixed-point parking, the accuracy of the fixed-point parking using the Bluetooth antenna is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1A schematic diagram of the structure of a Bluetooth antenna provided in one embodiment;

[0011] Figure 2 A schematic diagram of a simulation result of the radiation direction of the Bluetooth antenna provided in an embodiment of the present application in one embodiment;

[0012] Figure 3 A schematic diagram of the structure of a Bluetooth antenna provided in another embodiment;

[0013] Figure 4 A schematic diagram of the structure of a positioning device provided in an embodiment;

[0014] Figure 5 A schematic diagram of an application environment for fixed-point parking using Bluetooth positioning technology provided in an embodiment;

[0015] Description of reference numerals:

[0016] Bluetooth antenna: 10; First radiation branch: 101;

[0017] Second radiation branch: 102; Antenna tuning element: 103;

[0018] First antenna tuning element: 1031; Second antenna tuning element: 1032;

[0019] A third antenna tuning element: 1033; A fourth antenna tuning element 1034;

[0020] Bluetooth board: 20; Positioning device: 30;

[0021] Battery: 40; Mounting holes: 50;

[0022] Transportation: 60. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present disclosure and are not used to limit the embodiments of the present disclosure.

[0024] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", etc. may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] First, before specifically introducing the technical solution of the embodiment of the present disclosure, the technical background or technical evolution context on which the embodiment of the present disclosure is based is introduced. At present, the emergence of shared bicycles and shared electric motorcycles has greatly facilitated people's daily travel. Riding shared bicycles and shared electric motorcycles can alleviate traffic congestion to a great extent, but the disorderly parking of shared bicycles and shared electric motorcycles also hinders traffic and affects the overall image of the city. Based on this, a fixed-point parking technology is proposed, for example, using Bluetooth road studs and satellite positioning for fixed-point parking, etc. However, due to the high cost of satellite positioning fixed-point parking, the more common fixed-point parking technology at present is Bluetooth road stud fixed-point parking technology. Generally speaking, in the field of Bluetooth road stud fixed-point parking, the current technical background is: based on the principle that the Bluetooth signal strength decays regularly as the distance increases, the distance between the shared bicycle and the Bluetooth road stud is measured, and the signal transmission loss is calculated and converted into a distance value through the relationship between the distance between the shared bicycle and the Bluetooth road stud and the received signal strength indication, so as to achieve fixed-point parking. However, the accuracy of the fixed-point parking technology is limited by the accuracy of the measured Bluetooth signal, which makes the accuracy bottleneck, and the position of the Bluetooth module in the vehicle body relative to the vehicle body will also affect the precise entry into the fence. When the module is not located at the center of the vehicle body, there is an inherent positioning error, which is difficult to avoid, making the accuracy of the existing fixed-point parking difficult to explain; in addition, the principle of the above-mentioned fixed-point parking is to calculate the signal transmission loss and convert it into a distance value through the relationship between the distance between the shared bicycle and the Bluetooth road stud and the received signal strength indication, so that the direction cannot be measured, and the directional parking of the shared bicycle cannot be achieved. Based on this background, the applicant has found through long-term model simulation research and development and the collection, demonstration and verification of experimental data that when the Bluetooth signal is interfered by the environment, it will greatly affect the accuracy of the fixed-point parking achieved by using the Bluetooth positioning technology. How to improve the accuracy of fixed-point parking achieved through Bluetooth positioning technology has become a problem that needs to be solved urgently. In addition, it should be noted that the applicant has made a lot of creative efforts to determine the low accuracy of fixed-point parking achieved through Bluetooth positioning technology and the technical solutions introduced in the following embodiments.

[0028] The technical solutions involved in the embodiments of the present disclosure are introduced below in combination with the scenarios to which the embodiments of the present disclosure are applied.

[0029] Please refer to Figure 1 , which shows a Bluetooth antenna 10, which includes a first radiation branch 101, a second radiation branch 102 and a plurality of antenna tuning elements 103; the first radiation branch 101 and the second radiation branch 102 are connected to the Bluetooth board 20 through corresponding antenna tuning elements 103; and the first radiation branch 101 and the second radiation branch 102 are both arranged around the outer edge of the Bluetooth board 20.

[0030] The Bluetooth antenna 10 is a converter, which converts the guided waves propagating on the transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa, and is a component used to transmit or receive electromagnetic waves in a radio device. For example, the Bluetooth antenna in this embodiment can be a monopole antenna.

[0031] In this embodiment, as an optional implementation, the Bluetooth antenna 10 can be arranged along the outer edge of the Bluetooth board 10, and the Bluetooth antenna 10 can include a first radiation branch 101 and a second radiation branch 102, and the first radiation branch 101 and the second radiation branch 102 included in the Bluetooth antenna 10 are respectively connected to the Bluetooth board 20, wherein the first radiation branch 101 can be used to radiate / receive electromagnetic wave signals, and the second radiation branch 102 can be used to flexibly adjust the radiation direction and radiation angle of the electromagnetic wave signal. Optionally, in this embodiment, the materials constituting the first radiation branch 101 and the second radiation branch 102 can be copper, alloy, etc.

[0032] Optionally, in this embodiment, antenna tuning elements 103 may be provided at both ends of the first radiation branch 101 and the second radiation branch 102, and the first radiation branch 101 and the second radiation branch 102 may be respectively connected to the Bluetooth board 20 by corresponding antenna tuning elements 103; or, both ends of the first radiation branch 101 and the second radiation branch 102 may be respectively connected to the Bluetooth board 102 by corresponding antenna tuning elements 103, and this embodiment does not limit the connection method between the first radiation branch 101 and the second radiation branch 102 and the Bluetooth board 20. Optionally, the antenna tuning element 103 in this embodiment may include a chip capacitor or a chip inductor, and the antenna tuning element 103 may be used to adjust the radiation impedance of the Bluetooth antenna, balance the radiation direction of the Bluetooth antenna, improve the bandwidth of the Bluetooth antenna, and so on.

[0033] Optionally, the Bluetooth board 20 in this embodiment may also be connected to a battery device. The Bluetooth board 20 may be used to place a Bluetooth integrated circuit, and the battery device may be used to supply power to the Bluetooth integrated circuit.

[0034] Optionally, in the present embodiment, the first radiating branches 101 and the second radiating branches 102 are both arranged around the outer edge of the Bluetooth board 20, and the first radiating branches 101 and the second radiating branches 102 can be arranged in a manner that the first radiating branches 101 and the second radiating branches 102 are completely in contact with the outer edge of the Bluetooth board 20. Alternatively, the first radiating branches 101 and the second radiating branches 102 are arranged around the outer edge of the Bluetooth board 20, and the shapes of the first radiating branches 101 and the second radiating branches 102 are the same as the shapes of the outer edge of the Bluetooth board 20.

[0035] Optionally, in this embodiment, the first radiation branch 101 and the second radiation branch 102 can be as follows: Figure 1 The interval setting shown in the figure, or, as another optional implementation, the interval between the first radiation branch 101 and the second radiation branch 102 can also be 0, that is, the first radiation branch 101 is arranged close to the second radiation branch 102. This embodiment is not limited here, as long as the first radiation branch 101 and the second radiation branch 102 can be arranged around the outer edge of the Bluetooth board 20.

[0036] In addition, it should be noted that Figure 1 The semicircular shape of the Bluetooth board 20 is only a schematic diagram. Of course, the shape of the Bluetooth board 20 can also be other shapes, such as hexagonal, rectangular, etc. The present embodiment does not limit the shape of the Bluetooth board 20. Accordingly, no matter what shape the Bluetooth board 20 is, in the present embodiment, as long as the first radiation branch 101 and the second radiation branch 102 are arranged around the outer edge of the Bluetooth board 20, it will be sufficient.

[0037] As an example, Figure 2 The following is a schematic diagram of the simulation results of the radiation direction of the Bluetooth antenna provided in the embodiment of the present application. The simulation results are derived from commercial electromagnetic simulation software and respectively represent the gain direction relationship of the three planes XZ, YZ, and XY of the antenna. Figure 2 As shown, it can be seen that the Bluetooth antenna of the embodiment of the present application has a very uniform antenna radiation pattern at the center frequency of the working frequency band (limited by space, only the simulation results at 2450MHz are provided), and the uniformity is close to that of an ideal dipole antenna and a rod antenna. However, it should be pointed out that the feeding of the dipole antenna is more complicated, the volume of the rod antenna is larger, and the Bluetooth antenna provided in the embodiment of the present application occupies a smaller volume. Compared with traditional technologies, the Bluetooth antenna provided in the embodiment of the present application can also achieve a relatively uniform antenna radiation direction through a smaller occupied volume.

[0038] The above-mentioned Bluetooth antenna includes a first radiation branch, a second radiation branch and multiple antenna tuning elements. Since the first radiation branch and the second radiation branch are connected to the Bluetooth board through corresponding antenna tuning elements, and the first radiation branch and the second radiation branch are both arranged around the outer edge of the Bluetooth board, the electromagnetic wave radiation of the Bluetooth antenna can be made more uniform through the first radiation branch and the second radiation branch, thereby balancing the radiation range of the Bluetooth antenna and improving the antenna bandwidth. Furthermore, since the radiation range of the Bluetooth antenna is more uniform and the accuracy of the Bluetooth signal is higher, when the Bluetooth antenna is used to achieve fixed-point parking, the accuracy of the fixed-point parking using the Bluetooth antenna is improved.

[0039] In this embodiment, the specific arrangement of the first radiation branch 101 and the second radiation branch 102 at the outer edge of the Bluetooth board 20 is described. Figure 3As shown, the second radiation branch 102 is disposed between the first radiation branch 101 and the Bluetooth board 20 .

[0040] Optionally, in the present embodiment, the first radiating branch 101 and the second radiating branch 102 are arranged with an interval, there is a certain interval between the first radiating branch 101 and the second radiating branch 102, and the second radiating branch 102 is arranged between the first radiating branch 101 and the Bluetooth board 20. It can be understood that by arranging the second radiating branch 102 between the first radiating branch 101 and the Bluetooth board 20, the setting position of the first radiating branch 101 and the setting position of the second radiating branch 102 can be flexibly adjusted, so that the radiation direction and radiation angle of the electromagnetic wave signal of the Bluetooth antenna can be flexibly adjusted.

[0041] As an optional implementation, Figure 3 As shown, one end of the first radiation branch 101 is connected to the first RF interface of the Bluetooth chip on the Bluetooth board 20 through the first antenna tuning element 1031, the other end of the first radiation branch 101 is connected to the second RF interface on the Bluetooth board 20 through the second antenna tuning element 1032, one end of the second radiation branch 102 is connected to the third RF interface on the Bluetooth board through the third antenna tuning element 1033, and the other end of the second radiation branch 102 is connected to the fourth RF interface on the Bluetooth board 20 through the fourth antenna tuning element 1034.

[0042] In this embodiment, the second radiation branch of the Bluetooth antenna is arranged between the first radiation branch and the Bluetooth board. Through the mutual cooperation of the first radiation branch and the second radiation branch, the electromagnetic wave radiation of the Bluetooth antenna can be made more uniform, the radiation range of the Bluetooth antenna can be balanced, and the antenna bandwidth can be improved.

[0043] In some scenarios, the shape of the Bluetooth board can be semicircular. Figure 3 In one embodiment, the first radiation branch 101 and the second radiation branch 102 are both semicircular in shape.

[0044] In this embodiment, as an optional implementation, when the shape of the Bluetooth board is semicircular, the shapes of the first radiation branch 101 and the second radiation branch 102 can also be semicircular, that is, the first radiation branch 101 and the second radiation branch 102 can be arranged in a semicircular shape around the outer edge of the Bluetooth board 20.

[0045] In one embodiment, optionally, when the shape of the first radiating branch 101 and the second radiating branch 102 is semicircular, the difference between the semicircular angle of the first radiating branch 101 and the semicircular angle of the second radiating branch 102 may be less than a preset threshold, that is, the semicircular angle of the first radiating branch 101 is relatively close to the semicircular angle of the second radiating branch 102. As a preferred implementation mode, in order to ensure that the Bluetooth antenna provided in the embodiment of the present application can uniformly radiate electromagnetic wave signals, the difference between the semicircular angle of the first radiating branch 101 and the semicircular angle of the second radiating branch 102 is zero, that is, the semicircular angle of the first radiating branch 101 is the same as the semicircular angle of the second radiating branch 102.

[0046] In this embodiment, the difference between the semicircular angle of the first radiating branch of the Bluetooth antenna and the semicircular angle of the second radiating branch of the Bluetooth antenna is less than a preset threshold value. This can ensure that the Bluetooth antenna radiates electromagnetic wave signals evenly, balance the radiation range of the Bluetooth antenna, increase the antenna bandwidth, and make the Bluetooth signal more accurate.

[0047] In different scenarios, the required radiation range of the Bluetooth antenna may also be different. Therefore, in some scenarios, the radiation range of the Bluetooth antenna may need to be adjusted. In one embodiment, the distance between the first radiation branch 101 and the second radiation branch 102 is adjustable.

[0048] First of all, it should be noted that the radiation range of the Bluetooth antenna in this embodiment includes the radiation angle of the Bluetooth antenna and the radiation direction of the Bluetooth antenna. That is to say, in this embodiment, adjusting the radiation range of the Bluetooth antenna refers to adjusting the radiation angle and radiation direction of the Bluetooth antenna at the same time.

[0049] Optionally, in this embodiment, the distance between the first radiation branch 101 and the second radiation branch 102 is adjustable, so the distance between the first radiation branch 101 and the second radiation branch 102 in the Bluetooth antenna 10 can be adjusted, and the radiation range of the Bluetooth antenna 10 can be changed by adjusting the distance between the first radiation branch 101 and the second radiation branch 102. For example, in order to improve the uniformity of the electromagnetic wave signal radiation of the Bluetooth antenna, the distance between the first radiation branch 101 and the second radiation branch 102 can be reduced.

[0050] In this embodiment, the distance between the first radiation branch and the second radiation branch of the Bluetooth antenna is related to the radiation range of the Bluetooth antenna. The radiation range of the Bluetooth antenna can be adjusted by adjusting the distance between the first radiation branch and the second radiation branch, so that the radiation range of the Bluetooth antenna is more uniform, thereby improving the Bluetooth antenna field pattern that is easily affected by the external environment when using Bluetooth positioning technology to achieve fixed-point parking, and effectively improving the accuracy of fixed-point parking using the Bluetooth antenna.

[0051] In another embodiment, when the radiation range of the Bluetooth antenna is adjusted, the radiation range of the Bluetooth antenna 10 can also be adjusted by adjusting the cross-sectional area of ​​the first radiation branch 101 and the cross-sectional area of ​​the second radiation branch 102 of the Bluetooth antenna. In one embodiment, the cross-sectional area of ​​the first radiation branch 101 and the cross-sectional area of ​​the second radiation branch 102 are related to the radiation range of the Bluetooth antenna 10.

[0052] It can be understood that in this embodiment, the cross-sectional area of ​​the first radiating branch can be used to characterize the thickness of the first radiating branch, and the cross-sectional area of ​​the second radiating branch can also be used to characterize the thickness of the second radiating branch. Adjusting the cross-sectional area of ​​the first radiating branch 101 and the cross-sectional area of ​​the second radiating branch 102 is equivalent to adjusting the thickness of the first radiating branch 101 and the thickness of the second radiating branch 102.

[0053] Optionally, in one embodiment, the cross-sectional area of ​​the first radiation branch 101 and the cross-sectional area of ​​the second radiation branch 102 may also be related to the radiation range of the Bluetooth antenna 10. That is, in one embodiment, the radiation range of the Bluetooth antenna 10 may also be changed by adjusting the cross-sectional area of ​​the first radiation branch 101 and the cross-sectional area of ​​the second radiation branch 102.

[0054] Similarly, the radiation range of the Bluetooth antenna in this embodiment includes the radiation angle of the Bluetooth antenna and the radiation direction of the Bluetooth antenna, that is, in this embodiment, the radiation angle of the Bluetooth antenna and the radiation direction of the Bluetooth antenna can be changed at the same time.

[0055] In addition, as described in the above embodiment, the antenna tuning element 103 includes a chip capacitor or a chip inductor. As another optional implementation, in order to change the radiation range of the Bluetooth antenna 10, the radiation range of the Bluetooth antenna 10 can also be changed by adjusting the capacitance value or inductance value of the antenna tuning element 103.

[0056] In this embodiment, the cross-sectional area of ​​the first radiation branch and the cross-sectional area of ​​the second radiation branch of the Bluetooth antenna are related to the radiation range of the Bluetooth antenna. The radiation range of the Bluetooth antenna can be adjusted by adjusting the cross-sectional area of ​​the first radiation branch and the cross-sectional area of ​​the second radiation branch, so that the radiation range of the Bluetooth antenna is more uniform, thereby improving the Bluetooth antenna field pattern that is easily affected by the external environment when using Bluetooth positioning technology to achieve fixed-point parking, and effectively improving the accuracy of fixed-point parking using the Bluetooth antenna.

[0057] Please refer to Figure 4 , which shows a positioning device 30, the positioning device 30 includes the Bluetooth antenna 10 described in the above embodiment.

[0058] Optionally, the positioning device in this embodiment may be a Bluetooth device, a Bluetooth road stud, or a positioning device, or various terminal devices, etc., which are not limited in this embodiment. Figure 4 As shown, the positioning device 30 provided in this embodiment may include a Bluetooth board 20, a battery 40 and a mounting hole 50, etc., wherein the Bluetooth board 20 is provided with the Bluetooth antenna 10 described in the above embodiment. It should be noted that Figure 4 The Bluetooth antenna is arranged inside the Bluetooth board 20, wherein the description of the Bluetooth antenna 10 is referred to the description in the above embodiment, and this embodiment is not repeated here. Optionally, the battery 40 included in the positioning device 30 is used to power the positioning device 30, and the positioning device 30 can be installed on other devices through the mounting hole 50, so that other devices can be positioned through the positioning device 30.

[0059] The positioning device in this embodiment includes the Bluetooth antenna described in the above embodiment. Since the above Bluetooth antenna includes a first radiation branch, a second radiation branch and multiple antenna tuning elements, the first radiation branch and the second radiation branch are connected to the Bluetooth board through corresponding antenna tuning elements, and the first radiation branch and the second radiation branch are both arranged around the outer edge of the Bluetooth board, so that the electromagnetic wave radiation of the Bluetooth antenna can be more uniform through the first radiation branch and the second radiation branch, the radiation range of the Bluetooth antenna is balanced, and the antenna bandwidth is improved. Since the radiation range of the Bluetooth antenna is more uniform, the accuracy of the Bluetooth signal is higher, thereby improving the accuracy of the positioning device including the Bluetooth antenna when performing positioning.

[0060] In one embodiment, a vehicle 60 is provided, the vehicle comprising: Figure 4 A positioning device 30 is shown.

[0061] In this embodiment, a vehicle including the positioning device 30 described in the above embodiment is provided. For the Bluetooth antenna 10 in the positioning device 30, please refer to the description in the above embodiment, which will not be repeated in this embodiment.

[0062] Optionally, the vehicle 60 in this embodiment may be a shared bicycle, a shared electric vehicle, or a car or other vehicles. This embodiment does not limit the type of the vehicle 60.

[0063] Furthermore, when the vehicle 60 uses the Bluetooth positioning technology to perform fixed-point parking, the application environment diagram can be as follows: Figure 5 As shown, see Figure 5 The Bluetooth road stud transmits a Bluetooth signal through Bluetooth broadcasting, and the positioning device 30 in the vehicle 60 receives and processes the Bluetooth signal, for example, smoothing filtering and road stud selection processing can be performed. After that, the vehicle 60 performs a handshake connection with the central control device, and uploads the entry and location information of the Bluetooth road stud to the cloud server through the central control device for solution and judgment, thereby realizing the fixed-point parking of the vehicle.

[0064] The vehicle in this embodiment includes a positioning device, and the positioning device includes the Bluetooth antenna described in the above embodiment. Since the above Bluetooth antenna includes a first radiation branch, a second radiation branch and multiple antenna tuning elements, the first radiation branch and the second radiation branch are connected to the Bluetooth board through corresponding antenna tuning elements, and the first radiation branch and the second radiation branch are both arranged around the outer edge of the Bluetooth board, so that the electromagnetic wave radiation of the Bluetooth antenna can be more uniform through the first radiation branch and the second radiation branch, the radiation range of the Bluetooth antenna is balanced, and the antenna bandwidth is improved. Since the radiation range of the Bluetooth antenna is more uniform, the accuracy of the Bluetooth signal is higher, thereby improving the accuracy of the vehicle when positioning through the Bluetooth antenna.

[0065] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the embodiments of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the embodiments of the present disclosure, and these all belong to the protection scope of the embodiments of the present disclosure. Therefore, the protection scope of the patent of the embodiments of the present disclosure shall be subject to the attached claims.

Claims

1. A Bluetooth antenna, characterized in that: The Bluetooth antenna comprises: a first radiation branch, a second radiation branch and a plurality of antenna tuning elements; The first radiation branch and the second radiation branch are connected to the Bluetooth board through corresponding antenna tuning elements; and the first radiation branch and the second radiation branch are both arranged around the outer edge of the Bluetooth board.

2. The Bluetooth antenna according to claim 1, characterized in that: The second radiation branch is arranged between the first radiation branch and the Bluetooth board.

3. The Bluetooth antenna according to claim 1 or 2, characterized in that: The first radiating branch and the second radiating branch are both semicircular in shape.

4. The Bluetooth antenna according to claim 3, characterized in that: A difference between a semicircular opening angle of the first radiation branch and a semicircular opening angle of the second radiation branch is smaller than a preset threshold.

5. The Bluetooth antenna according to claim 4, characterized in that: The difference between the semicircular opening angle of the first radiating branch and the semicircular opening angle of the second radiating branch is zero.

6. The Bluetooth antenna according to claim 1, characterized in that: The antenna tuning element includes a chip capacitor or a chip inductor.

7. The Bluetooth antenna according to claim 1 or 2, characterized in that: One end of the first radiation branch is connected to the first RF interface of the Bluetooth chip on the Bluetooth board through the first antenna tuning element, and the other end of the first radiation branch is connected to the second RF interface of the Bluetooth board through the second antenna tuning element.

8. The Bluetooth antenna according to claim 1 or 2, characterized in that: One end of the second radiation branch is connected to the third RF interface on the Bluetooth board through a third antenna tuning element, and the other end of the second radiation branch is connected to the fourth RF interface on the Bluetooth board through a fourth antenna tuning element.

9. The Bluetooth antenna according to claim 1 or 2, characterized in that: The distance between the first radiation branch and the second radiation branch is adjustable.

10. The Bluetooth antenna according to claim 9, characterized in that: The distance between the first radiation branch and the second radiation branch is related to the radiation range of the Bluetooth antenna.

11. The Bluetooth antenna according to claim 1 or 2, characterized in that: The cross-sectional area of ​​the first radiation branch and the cross-sectional area of ​​the second radiation branch are related to the radiation range of the Bluetooth antenna.

12. A positioning device, characterized in that: The positioning device comprises the Bluetooth antenna as described in any one of claims 1-11.

13. A means of transport, characterized in that: The vehicle comprises a positioning device as claimed in claim 12.

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