Antenna and tire pressure sensor thereof

Abstract

The invention 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] The present invention relates to the field of communication technologies, and particularly to an antenna and a tire pressure sensor thereof. Background Art

[0002] A tire pressure sensor is installed on a wheel hub to collect tire pressure and transmit the collected tire pressure to a vehicle body ECU via a radio frequency signal. In order to achieve real-time monitoring of the air pressure, temperature, etc. inside the tire, it is required that the signal transmission of the antenna is stable, the transmission distance is far, and the anti-interference ability is strong. In the prior art, in order to increase the transmission power, the common practice is to increase the number of turns of the coil. Increasing the number of turns of the coil results in an increase in the volume and weight of the antenna, making it difficult for the tire pressure sensor to be miniaturized. Summary of the Invention

[0003] An object of the present invention is to overcome the deficiencies of the prior art and provide an antenna and a tire pressure sensor thereof, so as to solve the technical problem that the antenna in the existing tire pressure sensor is too large in volume, making it difficult for the tire pressure sensor to be miniaturized.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] In a first aspect, an embodiment of the present invention provides an antenna, including: an antenna body, where the antenna body includes: a first radiation layer and a dielectric layer, and the first radiation layer is attached to the dielectric layer.

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

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

[0008] In a specific embodiment, the antenna further includes: a control unit. A first connection portion is provided at the bottom of the antenna body, and a first opening is provided at the position of the control unit corresponding to the first connection portion, and the first connection portion is inserted into the first opening.

[0009] In a specific embodiment, the radiation patch extends to the first connection portion.

[0010] In a specific embodiment, a second connection portion is further provided at the bottom of the antenna body, a second opening is provided at the position of the control unit corresponding to the second connection portion, and the second connection portion is inserted into the second opening.

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

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

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

[0014] In a second aspect, an embodiment of the present invention provides a tire pressure sensor, including at least one antenna as described above.

[0015] Advantages of the present invention:

[0016] Compared with the prior art, by attaching the first radiation 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 volume of the antenna is smaller than that of an antenna with the same transmission power, reducing the volume 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 the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an antenna provided by an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of a control board in an antenna provided by an embodiment of the present invention;

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

[0021] Figure 4 It is a schematic diagram of the connection relationship structure between the antenna body and the control board in an antenna provided by an embodiment of the present invention.

[0022] Description of the reference numerals:

[0023] 10. Antenna body; 11. First radiation layer; 111. Radiation patch; 12. Dielectric layer; 13. First end; 14. Second end; 15. Transition section; 16. First connection part; 17. Second connection part; 20. Control unit; 21. First opening; 22. Second opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0028] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified or limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0031] Embodiment

[0032] In a first aspect, please refer to Figures 1 to 4 , an embodiment of the present invention provides an antenna, including: an antenna body 10, and the antenna body 10 includes: a first radiation layer 11 and a dielectric layer 12, and the first radiation layer 11 is attached to the dielectric layer 12.

[0033] The antenna proposed in this embodiment is based on the wavelength shortening principle, which reduces the transmission speed of the electromagnetic field, makes the electric field concentrate at the interface between the radiation layer and the dielectric layer 12, reduces the edge radiation loss, improves the radiation efficiency, increases the energy distribution in space, improves the radiation efficiency of the antenna, and is smaller in volume than an antenna with the same transmission power, realizing the miniaturization of the antenna. The wavelength shortening principle is that the dielectric constant ε of the dielectric layer 12 r and the electromagnetic wave propagation speed V satisfy where C is the speed of light, so that the operating wavelength λ of the antenna is shortened to where λ0 is the wavelength of free space at a certain frequency. Since the transmission speed of the electromagnetic field of the antenna becomes slower and the resonant frequency decreases, compared with an antenna with air as the dielectric layer, the antenna proposed in this application can cover lower frequencies with a shorter physical size and is smaller in volume than an antenna at the same frequency.

[0034] In this embodiment, the material of the dielectric layer 12 can be 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 material of the dielectric layer 12 is a PCB material. The PCB material has a stable dielectric constant and a low loss factor, enabling electromagnetic waves to propagate stably in the dielectric layer 12, reducing attenuation and distortion of signals during transmission, ensuring the radiation efficiency and signal quality of the antenna. At the same time, the PCB material has high mechanical strength and rigidity, which can provide stable physical support for the first radiation layer 11, thus ensuring the stability of the antenna during use. The PCB material is easy to process and manufacture for the antenna body 10, reducing production costs.

[0036] For the antenna proposed in this embodiment, attaching the first radiation layer 11 to the dielectric layer 12 reduces the transmission efficiency of electromagnetic waves, increases the energy distribution in space, improves the radiation efficiency of the antenna, and is smaller in volume than antennas with the same transmission power, reducing the volume of the antenna and realizing the miniaturization of the tire pressure sensor.

[0037] Please refer to Figure 2 , the first radiation layer 11 includes a plurality of radiation patches 111, and the plurality of radiation patches 111 are electrically connected to each other and arranged along the periphery of the dielectric layer 12.

[0038] Specifically, after the plurality of radiation patches 111 are electrically connected to each other, they can form an integrated radiation system within the operating frequency band. When current flows through these patches, each radiation patch 111 will generate electromagnetic radiation, causing the radiation patches 111 to produce a cooperative radiation effect within the operating frequency band, so that electromagnetic waves are superimposed and interfered with each other in space, and radiated outward in a specific direction and intensity to send out signals, keeping the radiation performance of the antenna stable; the radiation patches 111 are arranged along the edge of the dielectric layer 12, increasing the emission area of the antenna body 10, exciting a circular surface current, and the radiation fields are superimposed in the direction perpendicular to the plane of the dielectric layer 12, thereby enabling the antenna body 10 to achieve a better electromagnetic coupling effect within a limited space, reducing signal loss, and improving signal transmission quality.

[0039] Please refer to Figure 1 and Figure 3 , the antenna further includes: a control unit 20. A first connection portion 16 is provided at the bottom of the antenna body 10, and a first opening 21 is provided at the position of the control unit 20 corresponding to the first connection portion 16, and the first connection portion 16 is inserted into the first opening 21.

[0040] Specifically, the first connection portion 16 at the bottom of the antenna body 10 cooperates with the first opening 21 on the control unit 20 to achieve a firm connection between the antenna body 10 and the control unit 20, avoiding loosening or detachment of the connection caused by factors such as vibration, thereby improving the working stability of the antenna.

[0041] Please refer to Figure 2 , the radiation patch 111 extends to the first connection portion 16. By extending the radiation patch 111 to the first connection portion 16, the radiation frequency of the antenna is increased under the condition of limited internal space of the tire pressure sensor, enabling the antenna body 10 proposed in this embodiment to transmit stronger signals under the same power input or achieve communication at a farther distance.

[0042] Please refer to Figure 2 and Figure 3 , a second connection portion 17 is further provided at the bottom of the antenna body 10, and a second opening 22 is provided at the position of the control unit 20 corresponding to the second connection portion 17, and the second connection portion 17 is inserted into the second opening 22.

[0043] Specifically, the insertion of the second connection portion 17 into the second opening 22 cooperates with the insertion of the first connection portion 16 into the first opening 21 to achieve a double-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 again Figure 2 , in an embodiment, a second connection portion 17 is also provided on the other side of the bottom of the antenna body 10. The second connection portions 17 on both sides of the antenna body 10 are symmetric about the first connection portion 16. A feed source (not shown in the figure) is assembled on the second connection portion 17 on one side of the bottom of the antenna body 10, and a grounding electrode (not shown in the figure) is assembled on the second connection portion 17 on the other side of the bottom of the antenna body 10. By symmetrically arranging the feed source and the grounding electrode on both sides of the antenna body 10, interference and noise in the signal transmission process are reduced, the stability and reliability of the signal are improved, enabling the antenna body 10 to reasonably layout each component under the condition of limited internal space of the tire pressure sensor, improving the space utilization rate, and making the antenna body 10 more compact.

[0045] Please refer to Figure 2 , the antenna body 10 includes: opposite first end 13 and second end 14, and the horizontal height of the first end 13 is higher than that of 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 pattern of the antenna in space. The height difference between the first end 13 and the second end 14 of the antenna body 10 causes differences in the propagation path and phase of electromagnetic waves between the first end 13 and the second end 14 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 range of the radiation of the antenna body 10.

[0047] Please refer to again Figure 2 , the antenna body 10 further includes: a transition section 15, one end of the transition section 15 is connected to the first end 13, and the other end of the transition section 15 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 to transition from the first end 13 to the second end 14, reducing the reflection and scattering of electromagnetic waves at the connection, 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 radiation layer (not shown in the figure), the first radiation layer 11 and the second radiation layer are respectively attached to both sides of the dielectric layer 12, and the first radiation layer 11 and the second radiation layer have the same structure.

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

[0051] In a second aspect, the present invention also proposes a tire pressure sensor, including at least one antenna as described above.

[0052] Specifically, the antenna is applied to 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, for the antenna proposed by the present invention, attaching the first radiation layer 11 to the dielectric layer 12 reduces the transmission efficiency of electromagnetic waves, increases the energy distribution in space, improves the radiation efficiency of the antenna, and has a smaller volume than an antenna with the same transmission power, reducing the volume of the antenna and realizing the miniaturization of the tire pressure sensor.

[0054] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An antenna, characterized in that, Comprising: An antenna body, the antenna body comprising: a first radiation layer and a dielectric layer, the first radiation layer being attached to the dielectric layer.

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

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

4. The antenna according to claim 3, wherein The antenna further comprises: a control unit, a first connection portion is provided at the bottom of the antenna body, a first opening is provided at the position of the control unit corresponding to the first connection portion, and the first connection portion is inserted into the first opening.

5. The antenna according to claim 4, wherein The radiation patch extends to the first connection portion.

6. The antenna according to claim 4, characterized in that, A second connection portion is further provided at the bottom of the antenna body, a second opening is provided at the position of the control unit corresponding to the second connection portion, and the second connection portion is inserted into the second opening.

7. The antenna according to claim 1, wherein The antenna body comprises: a first end and a second end which are opposite, and the horizontal height of the first end is higher than that of the second end.

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

9. The antenna according to claim 1, characterized in that, The antenna body further comprises: a second radiation layer, the first radiation layer and the second radiation layer are respectively attached to both sides of the dielectric layer, and the first radiation layer and the second radiation layer have the same structure.

10. A tire pressure sensor, characterized in that, Comprising at least one antenna according to any one of claims 1 to 9.

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