Dual-frequency antenna, lock and two-wheeled vehicle

Abstract

The embodiment of the invention provides a dual-frequency antenna, a lock and a two-wheeled vehicle. The dual-band antenna includes: a dielectric substrate including a first surface and a second surface opposite to each other; the central radiation part is arranged on the first surface of the dielectric substrate; the at least one feeding point is connected to the central radiation part; the plurality of peripheral radiation parts are arranged on the first surface of the dielectric substrate around the central radiation part and are respectively separated from the central radiation part; a grounding member; and the plurality of connecting pieces are used for connecting the corresponding peripheral radiation pieces to the grounding pieces respectively.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of communication technology, and more specifically, to a dual-band antenna, a lock, and a two-wheeled vehicle. Background Art

[0002] In recent years, shared bicycles and motorcycles have flourished. Although this has made it easier for citizens to travel, disorderly parking has also hindered traffic and affected the overall image of the city. Irregular parking is the number one problem that needs to be solved in the development of shared two-wheeled vehicles. Fixed-point parking, that is, users return the bicycles in specified areas and directions, can effectively strengthen the standardized management of shared two-wheeled vehicles and rectify parking chaos. Shared two-wheeled vehicles use antenna modules for positioning, so the performance of the antenna module determines the positioning accuracy of shared two-wheeled vehicles. How to improve the positioning accuracy of the antenna module and reduce the size of the antenna module has become an urgent problem to be solved. Summary of the invention

[0003] In a first aspect of the present disclosure, a dual-band antenna is provided, comprising: a dielectric substrate, comprising a first surface and a second surface opposite to each other; a central radiating element, arranged on the first surface of the dielectric substrate; at least one feeding point, connected to the central radiating element; a plurality of peripheral radiating elements, arranged around the central radiating element on the first surface of the dielectric substrate and spaced apart from the central radiating element, respectively; a grounding element; and a plurality of connecting elements, respectively connecting the corresponding peripheral radiating elements to the grounding element.

[0004] In some embodiments, the central radiating element is a square sheet, and the plurality of peripheral radiating elements are four strip-shaped sheets, each of the peripheral radiating elements is disposed adjacent to a side edge of the central radiating element and extends in a direction parallel to the corresponding side edge.

[0005] In some embodiments, the four sides of the central radiating element have the same length, and the lengths of the plurality of peripheral radiating elements along the sides of the central radiating element are the same.

[0006] In some embodiments, the lengths of the four sides of the central radiator are less than The length of each peripheral radiator along the side direction of the central radiator is less than Wherein λ1 is the high-frequency band wavelength of the dual-frequency antenna, λ2 is the low-frequency band wavelength of the dual-frequency antenna, and Er is the dielectric constant of the dielectric substrate.

[0007] In some embodiments, the central radiating element is a circular piece, and the plurality of peripheral radiating elements are four arc-shaped pieces, each of the peripheral radiating elements respectively corresponding to a predetermined circumferential angle of the central radiating element.

[0008] In some embodiments, the at least one feeding point is one feeding point, two feeding points or four feeding points.

[0009] In some embodiments, at least one groove is disposed on a side of each of the plurality of peripheral radiating elements adjacent to the central radiating element.

[0010] In some embodiments, a corresponding protrusion is provided on the central radiation element at a position adjacent to the at least one groove.

[0011] In some embodiments, the grounding element is disposed at the second surface of the dielectric substrate, the plurality of connecting elements are respectively connected to a side of the corresponding peripheral radiating element away from the central radiating element, and the plurality of connecting elements respectively extend from the corresponding peripheral radiating element across the side edge of the dielectric substrate to the grounding element.

[0012] In some embodiments, the plurality of connection elements are respectively connected to middle portions of corresponding peripheral radiating elements on a side away from the central radiating element.

[0013] In a second aspect of the present disclosure, a lock is provided, comprising the dual-frequency antenna of the first aspect of the present disclosure.

[0014] In a third aspect of the present disclosure, a two-wheeled vehicle is provided, comprising the lock according to the second aspect of the present disclosure.

[0015] According to an embodiment of the present disclosure, by arranging a plurality of peripheral radiating elements around a central radiating element and connecting the peripheral radiating elements to a grounding element using a connector, the central radiating element can be used as a radiation medium for high-frequency electromagnetic waves, a coupling path for low-frequency electromagnetic waves can be established between the central radiating element and the plurality of peripheral radiating elements, and the peripheral radiating elements can be used as a radiation medium for low-frequency electromagnetic waves. In this way, the radiation of high-frequency electromagnetic waves and low-frequency electromagnetic waves can be achieved using a single antenna. Compared with the conventional solution of using two separate antennas to radiate high-frequency electromagnetic waves and low-frequency electromagnetic waves respectively, this solution can reduce the use of dielectric substrate materials on the one hand, thereby reducing antenna costs, and on the other hand, can reduce the cross-sectional height of the antenna, thereby reducing the volume of the antenna. In addition, since the plurality of peripheral radiating elements are arranged around the central radiating element, the phase centers of the plurality of peripheral radiating elements can coincide with the phase center of the central radiating element, thereby improving the positioning accuracy of the antenna.

[0016] It should be understood that the content described in this content section is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0018] Figure 1 A schematic diagram of a dual-frequency antenna according to an embodiment of the present disclosure is shown;

[0019] Figure 2 Shows Figure 1 A top view schematic diagram of the dual-band antenna shown;

[0020] Figure 3 The gain pattern of the high frequency band of the dual-frequency antenna according to one embodiment of the present disclosure is shown;

[0021] Figure 4 An axial ratio diagram of a high frequency band of a dual-frequency antenna according to an embodiment of the present disclosure is shown;

[0022] Figure 5 The gain pattern of the dual-frequency antenna in the low frequency band according to one embodiment of the present disclosure is shown;

[0023] Figure 6 An axial ratio diagram of a low frequency band of a dual-frequency antenna according to an embodiment of the present disclosure is shown;

[0024] Figure 7 A schematic top view of a dual-band antenna according to another embodiment of the present disclosure is shown; and

[0025] Figure 8 A schematic top view of a dual-band antenna according to yet another embodiment of the present disclosure is shown.

[0026] Description of reference numerals:

[0027] 100 dual-band antenna 1 dielectric substrate

[0028] 11 first surface 12 second surface

[0029] 2Central radiation piece 21 protrusion

[0030] 3 peripheral radiation parts 31 grooves

[0031] 4 Feeding points 5 Connectors

[0032] 6 Grounding piece DETAILED DESCRIPTION

[0033] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0034] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0035] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" 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 directly connected or indirectly connected 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 the present invention can be understood according to specific circumstances.

[0036] The solutions described in the embodiments of this disclosure, if they involve the processing of personal information, will be processed on the premise of having a legal basis (such as obtaining the consent of the subject of personal information, or being necessary for the performance of a contract, etc.), and will only be processed within the scope of regulations or agreements. If a user refuses to process personal information other than the necessary information for basic functions, it will not affect the user's use of basic functions.

[0037] As mentioned above, the shared two-wheeled vehicle uses an antenna module for positioning, so the performance of the antenna module determines the positioning accuracy of the shared two-wheeled vehicle. How to improve the positioning accuracy of the antenna module and reduce the size of the antenna module has become an urgent problem to be solved.

[0038] The positioning solution used for conventional fixed-point parking is to use satellite positioning. The application of satellite positioning systems in the positioning of shared two-wheeled vehicles is generally divided into three solutions: single-frequency positioning, dual-frequency positioning, and single / dual-frequency + RTD (real-time code phase difference) / RTK (real-time carrier phase difference). For the solution of single-frequency positioning using satellites, the positioning accuracy in an open environment is usually around 10 meters, so the redundancy of the electronic fence at the return point must be greater than 10 meters to ensure that users can return the vehicle normally. For the solution of dual-frequency positioning using satellites, such as dual-frequency + RTK positioning, sub-meter or even centimeter-level positioning can be achieved, so the dual-frequency positioning solution has higher positioning accuracy and obvious advantages. At present, the positioning solution used by most high-precision positioning bicycles is the dual-frequency + RTK solution.

[0039] In the dual-frequency + RTK solution, the base station and the mobile station need to keep tracking the same phase of more than 4 satellites. The antenna is the core component for achieving high-precision positioning, and the performance of the antenna directly determines the accuracy of satellite positioning. There are two solutions for traditional antenna systems. One solution is an integrated solution, which means putting the antenna and the hardware of the central control together to form a complete whole. The other solution is an external solution, in which the antenna is placed outside the central control and separated from the central control. Conventional vehicle-mounted antenna solutions for horseshoe locking point parking mostly use built-in antennas.

[0040] Shared two-wheeled vehicles have high requirements for antenna mutual coupling or antenna environment. At present, the antenna module of the horseshoe lock of the two-wheeled vehicle is blocked by the handcart seat and the middle axis. In order to improve the positioning accuracy, the antenna module generally has two separate antenna units, one of which is used to radiate high-frequency electromagnetic waves and the other is used to radiate low-frequency electromagnetic waves. These two antenna units usually adopt the following two arrangements. One arrangement is that the two antenna units are arranged side by side. This arrangement requires two dielectric substrates, so the cost of the antenna module is high. In addition, the side-by-side placement of the two antenna units will result in a larger volume of the antenna module, and the phase centers of the two antenna units do not overlap, so the positioning accuracy is low. Another arrangement is that the two antenna units are stacked. This arrangement also requires the use of two dielectric substrates, so the cost of the antenna module is also high, and the stacked arrangement will increase the cross-sectional height of the antenna module, making the volume of the antenna module larger. Therefore, conventional dual-frequency antennas are large in size, have limited installation locations, and are susceptible to interference, which significantly deteriorates the positioning performance. Therefore, when using dual-frequency positioning, it is difficult to achieve the ideal accuracy range, resulting in positioning failure or increased errors. It is difficult to achieve accurate parking in actual operations, and problems of random parking still exist.

[0041] The embodiments of the present disclosure provide a dual-frequency antenna to reduce the cost of the dual-frequency antenna, reduce the size of the dual-frequency antenna, and improve the positioning accuracy. Figures 1 to 8 To describe exemplary embodiments of the present disclosure.

[0042] Figure 1 shows a front view schematic diagram of a dual-frequency antenna according to an embodiment of the present disclosure, Figure 2 Shows Figure 1 The top view of the dual-band antenna is shown in FIG. Figure 1 and Figure 2 As shown, the dual-band antenna 100 described herein generally includes a dielectric substrate 1 , a central radiating element 2 , a feeding point 4 , a plurality of peripheral radiating elements 3 , a plurality of connecting elements 5 and a grounding element 6 .

[0043] The dielectric substrate 1 includes a first surface 11 and a second surface 12 facing away from each other. Figure 1 In the orientation shown, the first surface 11 is the upper surface of the dielectric substrate 1, and the second surface 12 is the lower surface of the dielectric substrate 1. Figure 2 In the orientation shown, only the first surface 11 of the dielectric substrate 1 is visible, but the second surface 12 of the dielectric substrate 1 cannot be seen. It should be understood that when the dual-band antenna 100 is placed in other orientations, the first surface 11 and the second surface 12 will face other directions accordingly.

[0044] The central radiating element 2 and the plurality of peripheral radiating elements 3 are both disposed on the first surface 11 of the dielectric substrate 1. The central radiating element 2 is disposed in the middle of the first surface 11 of the dielectric substrate 1, and the plurality of peripheral radiating elements 3 are disposed around the central radiating element 2. Each peripheral radiating element 3 is spaced apart from the central radiating element 2 by a predetermined distance, and is capable of establishing electromagnetic coupling with the central radiating element 2. The central radiating element 2 is used to radiate high-frequency electromagnetic waves, such as electromagnetic waves of 1575 MHz. The plurality of peripheral radiating elements 3 are used to radiate low-frequency electromagnetic waves, such as electromagnetic waves of 1176 MHz. The electromagnetic coupling between the central radiating element 2 and the plurality of peripheral radiating elements 3 is capable of providing a coupling path for low-frequency electromagnetic waves, so that the low-frequency electromagnetic waves can be transmitted between the central radiating element 2 and the plurality of peripheral radiating elements 3.

[0045] It should be noted that the numbers, values, etc. mentioned above and elsewhere in the present disclosure are exemplary and are not intended to limit the scope of the present disclosure in any way. Any other appropriate numbers and values ​​are possible.

[0046] In some embodiments, the central radiating element 2 and the plurality of peripheral radiating elements 3 are metal foils, such as copper foils. In other embodiments, the central radiating element 2 and the plurality of peripheral radiating elements 3 may be in other forms, which all fall within the scope of the present disclosure.

[0047] In some embodiments, the central radiating element 2 and the plurality of peripheral radiating elements 3 may be fabricated on the dielectric substrate 1 by laser direct structuring, chemical etching, physical etching, printing, or other processes, thereby simplifying the processing of the dual-frequency antenna 100. It should be understood that any other appropriate process may be used to form the central radiating element 2 and the plurality of peripheral radiating elements 3, and the embodiments of the present disclosure are not limited thereto.

[0048] The feed point 4 is connected to the central radiating element 2. In one embodiment, Figure 2 As shown, the number of feeding points 4 is two. Guided electromagnetic waves with different polarization directions, such as electromagnetic waves with two polarization directions perpendicular to each other, can be fed to the central radiating element 2 through the two feeding points 4. Through holes (not shown in the figure) corresponding to the two feeding points 4 can be opened in the dielectric substrate 1, and a feeding pattern can be formed on the inner wall of the through hole, thereby enabling signal feeding to the dual-frequency antenna from the second surface 12 side of the dielectric substrate 1. By changing the positions of the two feeding points 4 on the central radiating element 2, the polarization form of the electromagnetic wave can be changed. For example, as needed, the central radiating element 2 can radiate circularly polarized radio waves, elliptically polarized radio waves, or radio waves of other polarization forms. As shown in FIG. Figure 2 As shown, arrows A and B in the figure show a schematic transmission method of guided electromagnetic waves on the central radiating element 2, and the two feeding points in the figure are close to the lower left side of the central radiating element 2. Under this premise, the phase difference of the fed guided electromagnetic waves is configured to be 90 degrees different. As a result, the central radiating element 2 can generate circularly polarized guided electromagnetic waves. The dual-frequency antenna 100 can exchange information with the positioning satellite through the radio waves radiated by the central radiating element 2 and multiple peripheral radiating elements 3 to achieve positioning. The positioning satellite includes GPS (Global Positioning System), Beidou or other types of satellite positioning systems, which are not limited in the embodiments of the present disclosure. The dual-frequency antenna 100 of the embodiment of the present disclosure may also be referred to as a GNSS (Global Navigation Satellite System) antenna.

[0049] It should be understood that in the embodiments of the present disclosure, more or fewer feeding points 4 may be provided on the central radiating element 2 according to different design requirements. For example, a single feeding point 4 may be provided on the central radiating element 2 to achieve linearly polarized radio waves, or four feeding points 4 may be provided to achieve better axial ratio performance. In addition, in the embodiments of the present disclosure, the position of the feeding point 4 on the central radiating element 2 may be determined according to design requirements.

[0050] A plurality of connectors 5 connect the corresponding peripheral radiating elements 3 to the grounding element 6. The grounding element 6 can be connected to the outer conductor of the coaxial feeder, and the feeding point 4 is connected to the central conductor of the coaxial feeder through a coupler such as a connecting bridge. Figure 1 and Figure 2As shown, the grounding member 6 is disposed on the second surface 12 of the dielectric substrate 1 and is substantially in the form of a plane. The lateral dimension of the grounding member 6 may be slightly larger than the lateral dimension of the dielectric substrate 1. Of course, it is also feasible that the lateral dimension of the grounding member 6 is substantially equal to or smaller than the lateral dimension of the dielectric substrate 1. The plurality of connecting members 5 are respectively connected to a side of the corresponding peripheral radiating member 3 away from the central radiating member 2. The plurality of connecting members 5 respectively extend from the corresponding peripheral radiating member 3 across the side edge of the dielectric substrate 1 to the grounding member 6, as shown in FIG. Figure 1 The side edge of the dielectric substrate 1 refers to the side surface of the dielectric substrate 1 located between the first surface 11 and the second surface 12. In such an embodiment, the same manufacturing process can be used to manufacture the central radiation element 2, the plurality of peripheral radiation elements 3 and the plurality of connectors 5, thereby simplifying the manufacturing process of the dual-band antenna 100.

[0051] It should be understood that the grounding element 6 can be disposed at any appropriate position according to design requirements, and connected to the plurality of peripheral radiating elements 3 via appropriate connecting elements 5 .

[0052] By arranging multiple peripheral radiating elements 3 around the central radiating element 2 and connecting the peripheral radiating elements 3 to the grounding element 6 using the connecting element 5, the central radiating element 2 can be used as a radiation medium for high-frequency electromagnetic waves, a coupling path for low-frequency electromagnetic waves can be established between the central radiating element 2 and the multiple peripheral radiating elements 3, and the peripheral radiating elements 3 can be used as a radiation medium for low-frequency electromagnetic waves. In this way, the radiation of high-frequency electromagnetic waves and low-frequency electromagnetic waves can be achieved using a single antenna. Compared with the conventional solution of using two separate antennas to radiate high-frequency electromagnetic waves and low-frequency electromagnetic waves respectively, this solution can, on the one hand, reduce the use of materials for the dielectric substrate 1, thereby reducing the cost of the antenna, and on the other hand, can reduce the cross-sectional height of the antenna (i.e., along the Figure 1 In addition, since the plurality of peripheral radiating elements 3 are arranged around the central radiating element 2, the phase centers of the plurality of peripheral radiating elements 3 can coincide with the phase center of the central radiating element 2, thereby improving the positioning accuracy of the dual-frequency antenna 100.

[0053] In some embodiments, Figure 2As shown, the central radiating element 2 is a square piece, and the plurality of peripheral radiating elements 3 are four strip-shaped pieces. Each peripheral radiating element 3 is respectively disposed adjacent to one side of the central radiating element 2 and extends in a direction substantially parallel to the corresponding side. Each peripheral radiating element 3 is spaced a certain distance from the corresponding side of the central radiating element 2, and a coupling path for low-frequency electromagnetic waves is established between the two. The coupling characteristics between each peripheral radiating element 3 and the central radiating element 2 can be adjusted by changing the distance between each peripheral radiating element 3 and the corresponding side of the central radiating element 2. For example, the antenna impedance can be changed by changing the distance between the radiating elements, thereby adjusting the radiation amplitude and phase.

[0054] In one embodiment, Figure 2 As shown, each connection member 5 is respectively connected to the middle part of the corresponding peripheral radiation member 3 to connect the middle part of the corresponding peripheral radiation member 3 to the ground member 6. It should be understood that this is only an example and does not limit the scope of the present disclosure in any way. In other embodiments, each connection member 5 can be respectively connected to any other appropriate position of the corresponding peripheral radiation member 3.

[0055] In some embodiments, Figure 2 As shown, the lengths W of the four sides of the central radiator 2 are substantially equal, and the lengths L of the four peripheral radiators 3 along the side direction of the central radiator 2 are also substantially equal. With this arrangement, the dual-band antenna 100 can achieve good axial ratio performance. It should be understood that this is merely an example and does not limit the scope of the present disclosure in any way. In other embodiments, the lengths W of the four sides of the central radiator 2 may not be equal. For example, the lengths of one set of opposite sides may not be equal to the lengths of another set of opposite sides.

[0056] In some embodiments, Figure 2 As shown, four peripheral radiating elements 3 are evenly arranged around the central radiating element 2. The distances between the four peripheral radiating elements 3 and the central radiating element 2 are substantially equal. With this arrangement, it is possible to ensure that the dual-frequency antenna 100 can evenly radiate radio waves in all directions. When the dual-frequency antenna 100 is provided on a two-wheeled vehicle, no matter which direction the two-wheeled vehicle is parked, information can be well exchanged with the satellite system.

[0057] In some embodiments, the side length W of the central radiation element 2 is less than The length L of each peripheral radiating element 3 along the side direction of the central radiating element 2 is less than Wherein λ1 is the high frequency wavelength of the dual frequency antenna 100, λ2 is the low frequency wavelength of the dual frequency antenna 100, and Er is the dielectric constant of the dielectric substrate 1. With this arrangement, the volume of the dual frequency antenna 100 can be significantly reduced while ensuring positioning accuracy.

[0058] In some embodiments, the dielectric substrate 1 is made of a material with a dielectric constant greater than 5, such as ceramic, epoxy resin, or silicon nitride. By selecting a dielectric substrate 1 with a high dielectric constant and arranging the central radiating element 2 and the plurality of peripheral radiating elements 3 on the same side of the dielectric substrate 1, the volume of the dual-frequency antenna 100 can be reduced and the working bandwidth of the dual-frequency antenna can be increased.

[0059] In some embodiments, Figure 2 As shown, a groove 31 is provided on one side of each of the plurality of peripheral radiating elements 3 adjacent to the central radiating element 2. By changing the depth of the groove 31, the impedance of the dual-band antenna 100 can be adjusted, thereby adjusting the radiation amplitude and phase.

[0060] In some embodiments, Figure 2 As shown, corresponding protrusions 21 are provided at positions adjacent to the grooves 31 on the four sides of the central radiating element 2. The width of each protrusion 21 along the side direction of the central radiating element 2 may be less than or equal to the width of the corresponding groove 31. By changing the depth of the groove 31 and the protruding height of the protrusion 21, the impedance of the dual-band antenna 100 can be adjusted within a larger range, thereby adjusting the radiation amplitude and phase.

[0061] Figure 3 φ is the gain pattern of the dual-frequency antenna 100 in the high frequency band. It can be seen from the figure that the gain pattern in the high frequency band has a high symmetry, and the antenna gain is greater than 2 dBi. Figure 4 This is the axial ratio diagram of the high frequency band. It can be seen from the diagram that the axial ratio of the high frequency band is better than 3dB. Figure 5 and Figure 6 is the gain directivity diagram and axial ratio diagram of the low frequency band. Figure 5 and Figure 6 It can be seen that the dual-band antenna 100 also has good performance parameters in the low frequency band, the antenna gain is greater than 2dBi, and the axial ratio is better than 3dB.

[0062] Figure 7 A schematic top view of a dual-band antenna according to another embodiment of the present disclosure is shown. Figure 7 The structure of the dual-frequency antenna 100 is similar to Figure 1 and Figure 2 The structures of the dual-frequency antennas shown are similar. Only the differences between the two will be described below, and the same parts will not be repeated.

[0063] like Figure 7As shown, four feeding points 4 are provided on the central radiating element 2 to achieve better axial ratio performance. In addition, a plurality of grooves 31 are provided on a side of each of the plurality of peripheral radiating elements 3 adjacent to the central radiating element 2. Accordingly, a plurality of protrusions 21 are respectively provided on the four sides of the central radiating element 2 to correspond to the plurality of grooves 31. The width of each protrusion 21 along the side direction of the central radiating element 2 may be less than or equal to the width of the corresponding groove 31. By changing the depth of the groove 31 and the protruding height of the protrusion 21, the impedance of the dual-band antenna 100 can be adjusted, thereby adjusting the radiation amplitude and phase.

[0064] Figure 8 A schematic top view of a dual-band antenna according to yet another embodiment of the present disclosure is shown. Figure 8 The structure of the dual-frequency antenna 100 is similar to Figure 1 and Figure 2 The structure of the dual-band antenna 100 shown is similar, and the only difference is that the shapes of the central radiating element 2 and the plurality of peripheral radiating elements 3 are different.

[0065] like Figure 8 As shown, the central radiating element 2 is a circular piece, and the plurality of peripheral radiating elements 3 are four arc-shaped pieces. Each peripheral radiating element 3 corresponds to a predetermined circumferential angle of the central radiating element 2, such as 60° or a larger or smaller angle. Each peripheral radiating element 3 is spaced a certain distance from the central radiating element 2, and a coupling path for low-frequency electromagnetic waves is established between the two. The coupling characteristics (such as coupling phase and coupling strength) between each peripheral radiating element 3 and the central radiating element 2 can be adjusted by changing the distance between each peripheral radiating element 3 and the central radiating element 2. For example, the antenna impedance can be changed by changing the distance between the radiating elements, thereby adjusting the radiation amplitude and phase.

[0066] like Figure 8 As shown, the number of feeding points 4 is two. Guided electromagnetic waves with different polarization directions can be fed to the central radiating element 2 through the two feeding points 4. According to different design requirements, more or fewer feeding points 4 can be set on the central radiating element 2. For example, a single feeding point 4 can be set on the central radiating element 2 to achieve linearly polarized radio waves, or four feeding points 4 can be set to achieve better axial ratio performance.

[0067] like Figure 8 As shown, each connection member 5 is respectively connected to the middle portion of the corresponding peripheral radiation member 3 to connect the middle portion of the corresponding peripheral radiation member 3 to the grounding member 6. In other embodiments, each connection member 5 can be respectively connected to any other appropriate position of the corresponding peripheral radiation member 3, which falls within the scope of the present disclosure.

[0068] Combined with Figure 2 and Figure 7 The dual-band antenna 100 described above is similar. Figure 8 Each of the plurality of peripheral radiating elements 3 shown may be provided with at least one groove 31 on a side adjacent to the central radiating element 2 , and a corresponding protrusion 21 may be provided on the central radiating element 2 at a position adjacent to the at least one groove 31 .

[0069] The embodiment of the present disclosure also provides a lock, comprising any one of the dual-frequency antennas 100 described above, so that the lock has communication capability. The lock includes but is not limited to a horseshoe lock or a helmet lock.

[0070] An embodiment of the present disclosure further provides a two-wheeled vehicle, comprising any one of the locks described above.

[0071] According to the embodiments of the present disclosure, the dual-frequency antenna 100 realizes the performance of a single dual-frequency antenna with a smaller frequency ratio. Compared with traditional solutions, it has a smaller size and a more flexible installation position. It can effectively improve the degree to which the field pattern of the two-wheeled vehicle satellite positioning antenna is affected by the external metal environment, while reducing the antenna cost and effectively improving the positioning accuracy.

[0072] It should be understood that, in addition to locks and two-wheeled vehicles, the dual-frequency antenna 100 can also be applied to other scenarios where satellite system positioning is required, and the embodiments of the present disclosure are not limited to this.

[0073] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A dual-frequency antenna (100), comprising: A dielectric substrate (1) comprising a first surface (11) and a second surface (12) facing away from each other; A central radiation element (2) is arranged on the first surface (11) of the dielectric substrate (1); at least one feeding point (4) connected to the central radiating element (2); A plurality of peripheral radiation elements (3) are arranged on the first surface (11) of the dielectric substrate (1) around the central radiation element (2) and are spaced apart from the central radiation element (2); Grounding member (6); as well as A plurality of connecting members (5) respectively connect the corresponding peripheral radiation members (3) to the grounding member (6).

2. The dual-band antenna (100) according to claim 1, wherein the central radiating element (2) is a square plate, and the plurality of peripheral radiating elements (3) are four strip-shaped plates, each peripheral radiating element (3) is respectively arranged adjacent to a side edge of the central radiating element (2) and extends in a direction parallel to the corresponding side edge.

3. The dual-band antenna (100) according to claim 2, wherein the four sides of the central radiating element (2) are of equal length, and the lengths of the plurality of peripheral radiating elements (3) along the side directions of the central radiating element (2) are of equal length.

4. The dual-band antenna (100) according to claim 3, wherein the lengths of the four sides of the central radiating element (2) are less than The length of each peripheral radiation element (3) along the side direction of the central radiation element (2) is less than Wherein λ1 is the high-frequency wavelength of the dual-frequency antenna (100), λ2 is the low-frequency wavelength of the dual-frequency antenna (100), and Er is the dielectric constant of the dielectric substrate (1).

5. The dual-band antenna (100) according to claim 1, wherein the central radiating element (2) is a circular piece, and the plurality of peripheral radiating elements (3) are four arc-shaped pieces, each peripheral radiating element (3) corresponding to a predetermined circumferential angle of the central radiating element (2).

6. The dual-frequency antenna (100) according to claim 1, wherein the at least one feeding point (4) is one feeding point (4), two feeding points (4) or four feeding points (4).

7. The dual-band antenna (100) according to any one of claims 1 to 6, wherein each of the plurality of peripheral radiating elements (3) is provided with at least one groove (31) on a side adjacent to the central radiating element (2).

8. The dual-band antenna (100) according to claim 7, wherein a corresponding protrusion (21) is provided on the central radiating element (2) at a position adjacent to the at least one groove (31).

9. The dual-band antenna (100) according to any one of claims 1 to 6, wherein the grounding member (6) is arranged on the second surface (12) of the dielectric substrate (1), the multiple connecting members (5) are respectively connected to a side of the corresponding peripheral radiating member (3) away from the central radiating member (2), and the multiple connecting members (5) respectively extend from the corresponding peripheral radiating member (3) across the side edge of the dielectric substrate (1) to the grounding member (6).

10. The dual-band antenna (100) according to claim 9, wherein the plurality of connecting elements (5) are respectively connected to the middle of a side of the corresponding peripheral radiating element (3) away from the central radiating element (2).

11. A lock comprising the dual-frequency antenna (100) according to any one of claims 1 to 10.

12. A two-wheeled vehicle comprising the lock according to claim 11.

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