Antenna and tire pressure sensor thereof

Abstract

The utility model discloses an antenna and a tire pressure sensor thereof, the antenna comprises an antenna body, the antenna body comprises a first radiation layer and a dielectric layer, and the first radiation layer is attached to the dielectric layer. By means of the mode, the first radiation layer is attached to the dielectric layer, the transmission efficiency of electromagnetic waves is reduced, energy distribution in space is increased, the radiation efficiency of the antenna is improved, the size of the antenna is smaller than that of an antenna with the same transmitting power, the size of the antenna is reduced, and miniaturization of the tire pressure sensor is achieved.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to an antenna and its tire pressure sensor. Background Technology

[0002] Tire pressure sensors are mounted on the wheel hub to collect tire pressure data and transmit the collected data to the vehicle's ECU via radio frequency signals. To achieve real-time monitoring of tire pressure, temperature, and other parameters, the antenna needs stable signal transmission, long transmission distance, and strong anti-interference capabilities. In existing technologies, increasing the transmission power typically involves increasing the number of coil turns. However, this increases the antenna's size and weight, making miniaturization of the tire pressure sensor difficult. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an antenna and its tire pressure sensor to solve the technical problem that the antenna in the existing tire pressure sensor is too large, making it difficult to miniaturize the tire pressure sensor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, an embodiment of the present invention provides an antenna, comprising: an antenna body, the antenna body comprising: a first radiating layer and a dielectric layer, wherein the first radiating layer is attached to the dielectric layer.

[0006] In one specific embodiment, the dielectric layer is made of PCB material.

[0007] In one specific embodiment, the first radiating layer includes a plurality of radiating patches, which are electrically connected to each other and arranged around the periphery of the dielectric layer.

[0008] In one specific embodiment, the antenna further includes a control unit, the bottom of the antenna body is provided with a first connecting part, the control unit is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening.

[0009] In one specific embodiment, the radiating patch extends to the first connecting portion.

[0010] In one specific embodiment, the bottom of the antenna body is further provided with a second connecting part, and the control unit is provided with a second opening corresponding to the position of the second connecting part, and the second connecting part is inserted into the second opening.

[0011] In one specific embodiment, the antenna body includes: a first end and a second end opposite to each other, wherein the first end is at a higher horizontal height than the second end.

[0012] In one specific embodiment, the antenna body further includes a transition section, one end of which is connected to the first end, and the other end of which is connected to the second end.

[0013] In one specific embodiment, the antenna body further includes a second radiating layer, wherein the first radiating layer and the second radiating layer are respectively attached to both sides of the dielectric layer, and the first radiating layer and the second radiating layer have the same structure.

[0014] Secondly, embodiments of this utility model provide a tire pressure sensor, including at least one antenna as described above.

[0015] The beneficial effects of this utility model are:

[0016] Compared with existing technologies, by attaching the first radiating layer to the dielectric layer, the transmission efficiency of electromagnetic waves is reduced, the energy distribution in space is increased, the radiation efficiency of the antenna is improved, and the size is smaller than that of an antenna with the same transmission power, thus reducing the size of the antenna and realizing the miniaturization of the tire pressure sensor.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall antenna structure proposed in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the control board structure in an antenna according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the antenna body structure in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram illustrating the connection relationship between the antenna body and the control board in an antenna according to an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Antenna body; 11. First radiating layer; 111. Radiating patch; 12. Dielectric layer; 13. First end; 14. Second end; 15. Transition section; 16. First connecting part; 17. Second connecting part; 20. Control unit; 21. First opening; 22. Second opening. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0031] Example

[0032] Firstly, please refer to Figures 1 to 4 This utility model embodiment proposes an antenna, including: an antenna body 10, the antenna body 10 including: a first radiating layer 11 and a dielectric layer 12, the first radiating layer 11 being attached to the dielectric layer 12.

[0033] The antenna proposed in this embodiment is based on the wavelength shortening principle, which reduces the propagation speed of the electromagnetic field, concentrates the electric field at the interface between the radiating layer and the dielectric layer 12, reduces edge radiation loss, improves radiation efficiency, increases energy distribution in space, and enhances the antenna's radiation efficiency. Furthermore, it is smaller in size than antennas with the same transmission power, achieving antenna miniaturization. The wavelength shortening principle is based on the dielectric constant ε of the dielectric layer 12. r The propagation speed V of electromagnetic waves satisfies Where C is the speed of light, so that the antenna's operating wavelength λ is shortened at the same frequency. Where λ0 is the wavelength of free space at a certain frequency. Due to the slower transmission speed of the electromagnetic field of the antenna and the lower resonant frequency, compared with antennas using air as the dielectric layer, the antenna body 10 proposed in this application can cover lower frequencies with a shorter physical size, and has a smaller volume than antenna body 10 at the same frequency.

[0034] In this embodiment, the dielectric layer 12 can be made of any one of ceramic materials, polymer composite materials, glass fiber reinforced epoxy resin, silicon nitride ceramics, and PCB materials.

[0035] Preferably, in this embodiment, the dielectric layer 12 is made of PCB material. PCB material has a stable dielectric constant and a low loss factor, which enables electromagnetic waves to propagate stably in the dielectric layer 12, reduces signal attenuation and distortion during transmission, and ensures the radiation efficiency and signal quality of the antenna. At the same time, PCB material has high mechanical strength and rigidity, which can provide stable physical support for the first radiating layer 11, thereby ensuring the stability of the antenna. PCB material is easy to process and manufacture for the antenna body 10, reducing production costs.

[0036] The antenna proposed in this embodiment attaches the first radiating layer 11 to the dielectric layer 12, which reduces the transmission efficiency of electromagnetic waves, increases the energy distribution in space, improves the radiation efficiency of the antenna, and is smaller in size than an antenna with the same transmission power, thus reducing the size of the antenna and realizing the miniaturization of the tire pressure sensor.

[0037] Please see Figure 2 The first radiating layer 11 includes a plurality of radiating patches 111, which are electrically connected to each other and arranged around the periphery of the dielectric layer 12.

[0038] Specifically, after multiple radiating patches 111 are electrically connected to each other, they can form a unified radiation system within the operating frequency band. When current flows through these patches, each radiating patch 111 generates electromagnetic radiation, causing the radiating patches 111 to produce a synergistic radiation effect within the operating frequency band. This results in electromagnetic waves superimposing and interfering with each other in space, radiating outwards in a specific direction and intensity, transmitting signals, and maintaining stable antenna radiation performance. The radiating patches 111 are arranged along the edge of the dielectric layer 12, increasing the transmitting area of ​​the antenna body 10, exciting a ring-shaped surface current, and superimposing their radiation fields in a direction perpendicular to the plane of the dielectric layer 12. This allows the antenna body 10 to achieve better electromagnetic coupling within a limited space, reducing signal loss and improving signal transmission quality.

[0039] Please see Figure 1 and Figure 3 The antenna also includes a control unit 20. The bottom of the antenna body 10 is provided with a first connecting part 16. The control unit 20 is provided with a first opening 21 corresponding to the position of the first connecting part 16. The first connecting part 16 is inserted into the first opening 21.

[0040] Specifically, the first connecting part 16 at the bottom of the antenna body 10 cooperates with the first opening 21 on the control unit 20 to achieve a stable connection between the antenna body 10 and the control unit 20, avoiding loosening or falling off due to vibration and other factors, thereby improving the working stability of the antenna.

[0041] Please see Figure 2 The radiating patch 111 extends to the first connecting portion 16. By extending the radiating patch 111 to the first connecting portion 16, the radiation frequency of the antenna body 10 is increased under the limited internal space of the tire pressure sensor. This enables the antenna body 10 proposed in this embodiment to transmit stronger signals or achieve communication over a greater distance with the same power input.

[0042] Please see Figure 2 and Figure 3 The antenna body 10 is also provided with a second connecting part 17 at the bottom. The control unit 20 is provided with a second opening 22 corresponding to the position of the second connecting part 17, and the second connecting part 17 is inserted into the second opening 22.

[0043] Specifically, the second connecting part 17 is inserted into the second opening 22 and the first connecting part 16 is inserted into the first opening 21, which cooperates with each other to realize the two-point fixed connection between the antenna body 10 and the control unit 20, further improving the connection stability between the antenna body 10 and the control unit 20.

[0044] Please refer to it again. Figure 2 In one embodiment, a second connecting portion 17 is also provided on the other side of the bottom of the antenna body 10. The second connecting portions 17 located on both sides of the antenna body 10 are symmetrical about the first connecting portion 16. A feed source (not shown in the figure) is mounted on the second connecting portion 17 on one side of the bottom of the antenna body 10, and a ground electrode (not shown in the figure) is mounted on the second connecting portion 17 on the other side of the bottom of the antenna body 10. By symmetrically arranging the feed source and the ground electrode on both sides of the antenna body 10, interference and noise during signal transmission are reduced, and the stability and reliability of the signal are improved. This allows the antenna body 10 to reasonably arrange various components in the case of limited internal space of the tire pressure sensor, improving space utilization and making the antenna body 10 more compact.

[0045] Please see Figure 2 The antenna body 10 includes a first end 13 and a second end 14, which are opposite each other, with the first end 13 being at a higher horizontal height than the second end 14.

[0046] Specifically, the horizontal height of the first end 13 of the antenna body 10 is higher than that of the second end 14 of the antenna body 10, which changes the current distribution and electromagnetic field radiation mode of the antenna in space. The height difference between the first end 13 and the second end 14 of the antenna body 10 causes the propagation path and phase of the electromagnetic wave between the first end 13 and the second end 14 to differ when the antenna is working, thereby optimizing the radiation direction of the antenna body 10, enabling the signal to be radiated more concentratedly in a specific direction, enhancing the signal strength in the target area, and improving the directivity and coverage of the antenna body 10.

[0047] Please refer to it again. Figure 2 The antenna body 10 also includes a transition section 15, one end of which is connected to the first end 13, and the other end of which is connected to the second end 14.

[0048] Specifically, when current flows in the antenna body 10, the transition section 15, as an intermediate connection part, can smoothly guide the current from the first end 13 to the second end 14, reducing the reflection and scattering of electromagnetic waves at the connection point, thereby reducing signal loss and improving the radiation efficiency of the antenna body 10.

[0049] In another embodiment, the antenna body 10 further includes a second radiating layer (not shown in the figure), the first radiating layer 11 and the second radiating layer are respectively attached to both sides of the dielectric layer 12, and the first radiating layer 11 and the second radiating layer have the same structure.

[0050] Specifically, when current is transmitted to the antenna through the feed line, the first radiating layer 11 and the second radiating layer simultaneously generate electromagnetic radiation. Since the first radiating layer 11 and the second radiating layer are respectively attached to both sides of the dielectric layer 12, forming a symmetrical structure, under the same excitation conditions, the electromagnetic waves generated by the first radiating layer 11 and the second radiating layer will superimpose in space, and electromagnetic waves with the same phase will enhance each other in a specific direction, thereby improving the radiation intensity and directivity of the antenna and enhancing the signal transmission capability.

[0051] Secondly, this utility model also proposes a tire pressure sensor, including at least one antenna as described above.

[0052] Specifically, the antenna is used in the tire pressure sensor, so the beneficial effects of the tire pressure sensor are the same as those of the antenna.

[0053] Compared with the prior art, the antenna proposed in this utility model attaches the first radiating layer 11 to the dielectric layer 12, which reduces the transmission efficiency of electromagnetic waves, increases the energy distribution in space, improves the radiation efficiency of the antenna, and is smaller in size than an antenna with the same transmission power, thus reducing the size of the antenna and realizing the miniaturization of the tire pressure sensor.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An antenna, characterized by include: The antenna body includes a first radiating layer and a dielectric layer, the first radiating layer being attached to the dielectric layer. The antenna body also includes a first end and a second end opposite to each other, the first end being at a higher horizontal height than the second end. The antenna body further includes a second radiating layer, the first radiating layer and the second radiating layer being attached to opposite sides of the dielectric layer, and the first radiating layer and the second radiating layer having the same structure.

2. The antenna according to claim 1, characterized in that, The dielectric layer is made of PCB material.

3. The antenna according to claim 1, wherein, The first radiating layer includes a plurality of radiating patches, which are electrically connected to each other and arranged around the periphery of the dielectric layer.

4. The antenna according to claim 3, characterized in that, The antenna further includes a control unit, and the bottom of the antenna body is provided with a first connecting part. The control unit is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening.

5. The antenna according to claim 4, characterized in that, The radiating patch extends to the first connecting portion.

6. The antenna according to claim 4, wherein, The bottom of the antenna body is also provided with a second connecting part, and the control unit is provided with a second opening corresponding to the position of the second connecting part, and the second connecting part is inserted into the second opening.

7. The antenna according to claim 1, wherein, The antenna body further includes a transition section, one end of which is connected to the first end, and the other end of which is connected to the second end.

8. A tire pressure sensor, characterized by, It includes at least one antenna as described in any one of claims 1 to 7.

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