An RFID tag antenna for electronic license plates

Abstract

In order to solve the existing problems of the electronic license plate RFID tag antenna, the utility model provides an RFID tag antenna of electronic license plate, the antenna includes hard base material and antenna circuit board, a plurality of antenna plates and chip base made of conductive metal material are attached on the base material, the first antenna plate to the fifth antenna plate constitute annular structure, the sixth, seventh antenna plate is extension structure, and the first antenna plate width, the fourth and fifth antenna plate and chip base left and right position, the sixth and seventh antenna plate length width can be adjusted, the base material adopts FR4 base material and is equipped with positioning protrusion, it has beneficial effect significantly, designs the antenna circuit of small and exquisite adaptation metal piece slit on hard FR4 base material, annular main body structure cooperates extension wide piece and chip mounting base sheet, combines positioning protrusion and clear installation direction requirement, realizes accurate identification of long distance, simple structure, common material, component size is flexible and can be adjusted, is convenient for large -scale production reduces cost, and simultaneously is favorable to quick assembly, improves production, application and maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of RFID technology, specifically an RFID tag antenna for electronic license plates. Background Technology

[0002] RFID technology is widely used in various fields, and its application in the transportation sector is also constantly being explored and developed. Electronic license plates based on RFID tags are an important development direction in the transportation sector. In China, the application of embedding RFID tags into physical license plates is mainly concentrated in the management of electric bicycles.

[0003] If designed properly, UHF RFID tags can achieve long-distance identification and have the potential to be applied to electronic license plates. Existing similar patents vary in their approaches. One type focuses on the overall design of the electronic license plate, embedding the RFID tag into the plate, but does not highlight the RFID tag antenna circuit design within the electronic plate. Another type uses the license plate as the overall RFID tag antenna, directly connecting the chip to the license plate. A third type emphasizes the RFID circuit design, but has no similarity to this patent. This patent aims to adopt a small-sized RFID tag antenna design scheme, adjusting the appropriate RFID tag antenna circuit according to the opening of the metal license plate, making a small RFID tag embedded in the hole, and using the hole to amplify the radio signal to achieve the effect of long-distance identification.

[0004] To address this issue, the present invention provides an RFID tag antenna for electronic license plates. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an RFID tag antenna for electronic license plates, thus solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an RFID tag antenna for electronic license plates, comprising a substrate and an antenna circuit, wherein the substrate is attached with a first antenna plate, a second antenna plate, a third antenna plate, a fourth antenna plate, a fifth antenna plate, a sixth antenna plate, a seventh antenna plate, and an antenna plate chip base made of conductive metal material, wherein the first antenna plate, the second antenna plate, the third antenna plate, the fourth antenna plate, and the fifth antenna plate form a ring structure, and the sixth antenna plate and the seventh antenna plate are extension structures.

[0007] Preferably, the width of the first antenna plate is adjustable.

[0008] Preferably, the left and right positions of the fourth antenna board, the fifth antenna board, and the antenna board chip base are adjustable.

[0009] Preferably, the length and width of the sixth antenna plate and the seventh antenna plate are adjustable.

[0010] Preferably, the substrate is an FR4 substrate.

[0011] Preferably, the outer side of the substrate is fixedly installed with a first positioning protrusion, a second positioning protrusion, a third positioning protrusion, a fourth positioning protrusion and a fifth positioning protrusion.

[0012] Beneficial effects

[0013] This invention provides an RFID tag antenna for electronic license plates. Compared with the prior art, it has the following advantages:

[0014] 1. The RFID tag antenna for this electronic license plate features a compact antenna circuit designed on a rigid FR4 substrate, adapted to a slotted metal sheet. It employs a ring-shaped main structure with an extended wide plate and a chip mounting substrate, along with pre-drilled positioning protrusions. This design achieves long-distance identification while ensuring accuracy. This simple structure uses common materials, and the dimensions of each component are flexibly adjustable. It is not only easy to mass-produce to reduce costs, but also facilitates rapid assembly thanks to the positioning protrusions and clear installation direction requirements, improving efficiency in both production and practical application and maintenance scenarios. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the external structure of this utility model;

[0017] Figure 2 This is a three-dimensional view of the installation structure of this utility model.

[0018] In the diagram: 1. First antenna board; 2. Second antenna board; 3. Third antenna board; 4. Fourth antenna board; 5. Fifth antenna board; 6. Sixth antenna board; 7. Seventh antenna board; 8. Antenna board chip base; 9. Substrate; 10. First positioning protrusion; 11. Second positioning protrusion; 12. Third positioning protrusion; 13. Fourth positioning protrusion; 14. Fifth positioning protrusion; 15. RFID tag antenna; 16. Metal gap. Detailed Implementation

[0019] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0020] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Reference Figures 1 to 2 This application provides an RFID tag antenna for electronic license plates, including an RFID tag antenna 15. The RFID tag antenna 15 includes a substrate 9. The substrate 9 is attached with a first antenna plate 1, a second antenna plate 2, a third antenna plate 3, a fourth antenna plate 4, a fifth antenna plate 5, a sixth antenna plate 6, a seventh antenna plate 7, and a chip base 8, all made of conductive metal material. The first antenna plate 1, the second antenna plate 2, the third antenna plate 3, the fourth antenna plate 4, and the fifth antenna plate 5 form a ring structure, while the sixth antenna plate 6 and the seventh antenna plate 7 are extension structures.

[0022] The width of the first antenna plate 1 is adjustable. The left and right positions of the fourth antenna plate 4, the fifth antenna plate 5, and the chip base 8 are adjustable. The length and width of the sixth antenna plate 6 and the seventh antenna plate 7 are adjustable. The substrate 9 is made of FR4 substrate. The outer side of the substrate 9 is fixedly mounted with a first positioning protrusion 10, a second positioning protrusion 11, a third positioning protrusion 12, a fourth positioning protrusion 13, and a fifth positioning protrusion 14.

[0023] In this embodiment, the prepared product is as follows Figure 1 When the RFID tag antenna is embedded in the gap of the metal sheet, ensure that the second positioning protrusion 11 is close to one side of the gap. Install according to this direction to ensure the correct installation position of the antenna and achieve optimal identification performance. Figure 2 The example shown demonstrates the accurate embedding of the RFID tag 15 into the metal gap 16.

[0024] Overall structural design: The RFID tag antenna circuit is designed on the rigid substrate 9. The circuit, including the substrate 9, is small in size, which makes it easy to embed the metal sheet through the slot.

[0025] Antenna main body structure: The RFID tag antenna main body adopts a ring structure with a wide strip of variable width extending from one side, and is equipped with a chip mounting substrate. This structural design helps to optimize the antenna's signal reception and transmission performance and adapt to the working requirements in metal environments.

[0026] Substrate 9 Selection and Positioning Design: To ensure convenient installation, a rigid, thin FR4 substrate 9 is selected. Five positioning protrusions are reserved at the four corners and one top of the substrate 9. During the embedding installation process, these positioning protrusions can effectively reduce installation position deviation and improve installation accuracy.

[0027] Installation orientation requirements: The tag antenna has specific orientation requirements. When embedding, the protrusion on the short side should be close to the edge of the slit to ensure the coupling effect between the antenna and the metal plate slit and achieve the best long-distance identification performance.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An RFID tag antenna for an electronic license plate, characterized in that: The RFID tag antenna (15) includes a substrate (9), on which a first antenna plate (1), a second antenna plate (2), a third antenna plate (3), a fourth antenna plate (4), a fifth antenna plate (5), a sixth antenna plate (6), a seventh antenna plate (7), and a chip base (8) made of conductive metal material are attached. The first antenna plate (1), the second antenna plate (2), the third antenna plate (3), the fourth antenna plate (4), and the fifth antenna plate (5) form a ring structure, and the sixth antenna plate (6) and the seventh antenna plate (7) are extension structures.

2. The RFID tag antenna for an electronic license plate according to claim 1, characterized in that: The width of the first antenna plate (1) is adjustable.

3. The RFID tag antenna for an electronic license plate according to claim 1, characterized in that: The left and right positions of the fourth antenna plate (4), the fifth antenna plate (5), and the antenna plate chip base (8) are adjustable.

4. The RFID tag antenna for an electronic license plate according to claim 1, characterized in that: The length and width of the sixth antenna plate (6) and the seventh antenna plate (7) are adjustable.

5. The RFID tag antenna for an electronic license plate according to claim 1, characterized in that: The substrate (9) is an FR4 substrate.

6. The RFID tag antenna for an electronic license plate according to claim 5, characterized in that: The outer side of the substrate (9) is fixedly installed with a first positioning protrusion (10), a second positioning protrusion (11), a third positioning protrusion (12), a fourth positioning protrusion (13), and a fifth positioning protrusion (14).

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