Small UHF RFID tag antenna applied to metal article
By designing a UHF RFID tag antenna with a ring structure, the combination of a concave inner notch structure and a molded metal sheet is used to solve the problems of large size, high cost and high flatness when used on metal objects, and the design of a small, low-cost, omnidirectional RFID tag antenna is realized, suitable for curved metal surfaces.
Patent Information
- Application Number
- CN202421465484.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-25
AI Technical Summary
When used on metal objects, existing RFID tag antennas have large sizes and high cost, and require high flatness of the adhesion surface, making it difficult to adapt to the application of curved metal surfaces.
A small UHF RFID tag antenna is designed, which adopts an antenna body with a ring structure. One end of the ring structure is a concave inner notch structure, and a metal sheet is formed at the other end. The metal sheet accounts for 3/5-4/5 of the total area of the ring structure, which is suitable for attaching to metal objects.
The design of small, low-cost, omnidirectional RFID tag antenna is realized, suitable for most tag application scenarios, especially for curved metal surfaces, reducing costs and reducing the requirements for the surface flatness of the attachment.
Smart Images
Figure CN222763184U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of RFID, in particular to a small UHF RFID tag antenna applied to metal objects. Background Art
[0002] RFID tag antennas usually require ultra-miniaturized designs. In the existing RFID field, curved wire antennas are usually used, and such antennas are usually affected by the surface of the object on which they are placed. Microstrip antennas do have advantages over traditional wire antennas when the surface to which the RFID tag is attached needs to be considered due to the fixed ground plane of the microstrip antenna. However, the microstrip patch antenna attached to such RFID tags is relatively large in size. Utility Model Content
[0003] The purpose of the utility model is to provide a small UHF RFID tag antenna for use on metal objects in view of the defects and shortcomings of the prior art, which can solve the above-mentioned defects.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions: it includes an antenna body; the antenna body is an annular structure; one end of the annular structure is an inwardly concave notch structure; the other end of the annular structure is integrally formed with a metal sheet.
[0005] Preferably, the metal sheet occupies 3 / 5-4 / 5 of the total area of the annular structure.
[0006] Preferably, the annular structure is an arrow-shaped structure.
[0007] Preferably, the arrow-shaped structure is a pen tip structure.
[0008] Preferably, the inner notch structure is located at the arrow tip position of the arrow-shaped structure, and the metal sheet extends from the arrow tail position of the arrow-shaped structure to the arrow tip position to a position close to the arrow tip position.
[0009] Preferably, the width of the inner notch structure matches the thickness of the chip.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a small UHF RFID tag antenna for use on metal objects, which has a simple structure, uses a PET substrate, has low cost, is omnidirectional, has a moderate size, is suitable for most tag application scenarios, and can be used on curved metal surfaces. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the utility model.
[0012] Description of reference numerals:
[0013] Antenna body 1, inner notch structure 1-1, metal sheet 1-2. DETAILED DESCRIPTION
[0014] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the utility model.
[0015] like Figure 1 As shown, this specific embodiment adopts the following technical scheme: it includes an antenna body 1; the antenna body 1 is an annular structure in the shape of a pen tip, and the arrow tip position of the annular structure is an inward-concave recessed structure 1-1 that matches the thickness D of the chip; a metal sheet 1-2 is integrally formed at the arrow tail position of the annular structure, and the metal sheet 1-2 extends from the arrow tail position to the arrow tip position, and the metal sheet 1-2 occupies 3 / 5-4 / 5 of the total area of the annular structure.
[0016] When using the antenna, the antenna is attached to the object using the metal sheet 1-2, with the arrow tip located outside the object, thereby minimizing the impact of the environment on the antenna performance.
[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a small UHF RFID tag antenna for use on metal objects, which has a simple structure, uses a PET substrate, has low cost, is omnidirectional, has a moderate size, is suitable for most tag application scenarios, and can be used on curved metal surfaces, solving the defects of existing anti-metal tags, such as high cost and high flatness requirements of the surface of the attached object.
[0018] For those skilled in the art, they can modify the technical solutions recorded in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A small UHF RFID tag antenna for use on metal objects, characterized in that: It comprises an antenna body (1); the antenna body (1) is in a ring-shaped structure; one end of the ring-shaped structure is in a concave inner notch structure (1-1); and the other end of the ring-shaped structure is integrally formed with a metal sheet (1-2).
2. The small UHF RFID tag antenna for use on metal objects according to claim 1, characterized in that: The metal sheet (1-2) occupies 3 / 5-4 / 5 of the total area of the annular structure.
3. The small UHF RFID tag antenna for use on metal objects according to claim 1, characterized in that: The width of the inner notch structure (1-1) matches the thickness of the chip.
4. The small UHF RFID tag antenna for use on metal objects according to claim 1, characterized in that: The annular structure is an arrow-shaped structure.
5. The small UHF RFID tag antenna for use on metal objects according to claim 4, characterized in that: The arrow-shaped structure is in the shape of a pen tip structure.
6. The small UHF RFID tag antenna for use on metal objects according to claim 4, characterized in that: The inner recess structure (1-1) is located at the tip of the arrow-shaped structure, and the metal sheet (1-2) extends from the tail of the arrow-shaped structure to the tip of the arrow and to a position close to the tip of the arrow.