Single-chip extension of multiple nfc antenna tags

Abstract

The utility model belongs to the technical field of anti -fake label especially relates to a single chip expansion multiple NFC antenna label, including chip, the first antenna and the second antenna are symmetrically distributed in the upper and lower sides of chip, are connected through metal wire one between the first antenna and the second antenna, the first antenna and the second antenna all are connected with chip through metal wire two, chip connects the first antenna and the second antenna through metal wire two simultaneously, makes a single chip can control two antennas to work cooperatively, when external read-write equipment is close to the antenna of any position, the antenna will receive the radio frequency signal transmission to chip, chip handles the signal and returns the response through the same path, the symmetrical distribution design of two antennas realizes multidirectional signal coverage, effectively avoided the identification difficult of traditional single antenna label because of position concealment or angle problem, solved the technical problem that traditional NFC label can only one to one fixed point reading.

Description

Technical Field

[0001] This utility model belongs to the field of anti-counterfeiting label technology, and in particular relates to a single chip extended with multiple NFC antennas label. Background Technology

[0002] Traditional NFC tag designs employ a single-chip, single-antenna structure, where one chip connects to one antenna, forming a one-to-one communication mode. Due to the limited radiation directionality and spatial coverage of a single antenna, poor signal reception or even failure to identify the tag often occurs when the relative position or angle between the reader / writer and the tag is incorrect. This is especially true when applied to cylindrical or complex curved products such as 3D printing consumables, where traditional single-antenna tags often fail to be read properly due to their concealed location or angle when users approach the product from different angles, severely impacting user experience and data collection efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a single chip for extending multiple NFC antenna tags, thereby solving the problems in the prior art. The specific technical solution is as follows: A single chip extends multiple NFC antenna tags, including a chip, with a first antenna and a second antenna symmetrically distributed on the top and bottom sides of the chip. The first antenna and the second antenna are connected by a metal wire, and both the first antenna and the second antenna are connected to the chip by a metal wire.

[0004] Furthermore, rivet points are provided between the first metal wire and the second metal wire, between the upper end of the second metal wire and the first antenna, and between the lower end of the second metal wire and the second antenna.

[0005] Furthermore, defective ink dots are printed on the test points of the chip.

[0006] Furthermore, both the first and second antennas are aluminum planar spiral structures.

[0007] Furthermore, both the first antenna and the second antenna are mounted on an insulating substrate, and the chip is fixed to the insulating substrate with conductive adhesive.

[0008] Furthermore, the chip is encapsulated with a protective layer made of epoxy resin or UV adhesive, with a thickness of 50-100μm.

[0009] Furthermore, the insulating substrate is pre-attached to the roll material.

[0010] Furthermore, the impedance matching circuits of both the first and second antennas employ LC resonant networks.

[0011] Furthermore, the chip integrates a complete NFC protocol stack, supports the ISO / IEC 14443A standard protocol, and operates at a frequency of 13.56MHz.

[0012] Furthermore, the chip has multiple general-purpose input / output pins and an SPI communication interface.

[0013] The advantages of this utility model are: The chip is connected to both the first and second antennas via two metal wires, enabling a single chip to control the two antennas to work together. When an external reading device approaches either antenna, the antenna transmits the received radio frequency signal to the chip. After processing the signal, the chip returns a response through the same path. The symmetrical distribution design of the two antennas achieves multi-directional signal coverage, solving the problem of difficulty in reading products from multiple angles and directions. It is particularly suitable for scenarios such as 3D printing consumable trays that require data collection from different angles. It effectively avoids the identification difficulties caused by the concealed location or angle of traditional single-antenna tags, and solves the technical problem that traditional NFC tags can only be read at one fixed point. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Explanation of markings in the diagram: 1. First antenna; 2. Second antenna; 3. Riveting point; 4. Chip; 5. Defective ink spot; 6. Metal wire one; 7. Metal wire two; 8. Insulating substrate; 9. Roll material. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] Example 1: As Figures 1-2As shown, a single chip extends multiple NFC antenna tags, including a chip 4. A first antenna 1 and a second antenna 2 are symmetrically distributed on the upper and lower sides of the chip 4. The first antenna 1 and the second antenna 2 are connected by a metal wire 6. Both the first antenna 1 and the second antenna 2 are connected to the chip 4 by a metal wire 7. The working principle of the above technical solution is as follows: Chip 4 is connected to both the first antenna 1 and the second antenna 2 via metal wire 2 7, enabling a single chip to control the two antennas to work together. When an external reading / writing device approaches any antenna, the antenna transmits the received radio frequency signal to chip 4. After processing the signal, chip 4 returns a response through the same path. The symmetrical distribution design of the two antennas achieves multi-directional signal coverage, solving the problem of difficulty in reading products from multiple angles and directions. It is particularly suitable for scenarios such as 3D printing consumable trays that require data collection from different angles. It effectively avoids the identification difficulties caused by the concealed position or angle of traditional single-antenna tags, and solves the technical problem that traditional NFC tags can only be read at one fixed point.

[0018] Example 2: Figures 1-2 As shown, there are rivet points 3 between the first metal wire 6 and the second metal wire 7, between the upper end of the second metal wire 7 and the first antenna 1, and between the lower end of the second metal wire 7 and the second antenna 2. The working principle of the above technical solution: As a key connection node, the riveting point 3 ensures the reliability and stability of the electrical connection between the antenna and the chip. In actual use, the tag may be subjected to mechanical stress such as bending and stretching. The riveting point 3 forms a firm electrical connection through physical pressing, avoiding the problems of poor soldering and desoldering that may occur in traditional welding methods. In addition, the riveting process simplifies the production process and reduces production costs, making it particularly suitable for the automated production of large quantities of NFC tags. These riveting points also serve as impedance matching points, reducing reflections and losses during signal transmission and ensuring the signal integrity of the first antenna 1 and the second antenna 2 at a working frequency of 13.56MHz. This enables the chip 4 to efficiently exchange data with external reading and writing devices.

[0019] Example 3: Figures 1-2 As shown, defective ink dots 5 are printed on the test points of the chip 4; The working principle of the above technical solution is as follows: the defective ink dot 5 is a quality control mark in the production process, used to mark the chip 4 that fails the test. After the label is produced, each label is functionally tested by a special testing device, including key parameters such as antenna resonant frequency, read and write distance, and data transmission rate. For products that fail the test, the automatic printing system will accurately print the defective ink dot 5 on the designated test point of the chip 4 as a clear waste mark. This design prevents defective products from entering the market and ensures the consistency and reliability of the products. At the same time, it simplifies quality traceability in the production process and improves production efficiency. In the anti-counterfeiting application scenario of 3D printing consumables, this mechanism ensures that every label put into the market can work stably and effectively maintain the stability of the product market.

[0020] Example 4: Figures 1-2 As shown, both the first antenna 1 and the second antenna 2 are aluminum planar spiral structures; The working principle of the above technical solution: The antenna design with aluminum planar spiral structure takes into account both performance and cost. Aluminum has good conductivity and is inexpensive. Through etching process, coils of a specific shape can be precisely formed on the insulating substrate. The planar spiral structure achieves the maximum inductance in a limited space, optimizing the Q value and radiation efficiency of the antenna. The first antenna 1 and the second antenna 2 adopt a symmetrical planar spiral design, which ensures the consistency of signal reception in different directions and solves the problem that traditional single-antenna tags can only be read from a specific angle. This structure is particularly suitable for application scenarios such as 3D printing consumable trays, so that users can stably read anti-counterfeiting information no matter which angle they approach the product, greatly improving the user experience and the reliability of data collection.

[0021] Example 5: Figures 1-2 As shown, the first antenna 1 and the second antenna 2 are both disposed on the insulating substrate 8, and the chip 4 is fixed on the insulating substrate 8 by conductive adhesive. The working principle of the above technical solution is as follows: The insulating substrate 8 (usually made of polyimide PI film) provides a stable physical support and electrical isolation environment for the antenna and the chip 4. The conductive adhesive, as the connection medium between the chip 4 and the antenna, not only provides a reliable electrical connection, but also has good flexibility and fatigue resistance. It can effectively absorb mechanical stress and prevent connection failure caused by bending or vibration. This structure is particularly suitable for application scenarios that need to be attached to curved surfaces or easily deformable objects, such as the cylindrical surface of a 3D printing consumable tray.

[0022] Example 6: Figures 1-2 As shown, a protective layer is encapsulated on the chip 4. The protective layer is made of epoxy resin or UV adhesive and has a thickness of 50-100μm. The working principle of the above technical solution is as follows: the protective layer acts as a physical protective barrier for chip 4, effectively preventing damage to the chip from the external environment (such as moisture, dust, and mechanical scratches).

[0023] Example 7: Figures 1-2 As shown, the insulating substrate 8 is pre-attached to the roll material 9; The working principle of the above technical solution is as follows: In practical applications, users can easily peel off individual labels from roll 9 as needed and stick them onto products such as 3D printing consumable trays. The release paper design on the back of roll 9 ensures the stability of the labels during storage and transportation, while also guaranteeing easy peeling during use.

[0024] Example 8: Figures 1-2 As shown, the impedance matching circuits of the first antenna 1 and the second antenna 2 both adopt LC resonant networks; The chip 4 integrates a complete NFC protocol stack, supports the ISO / IEC 14443A standard protocol, and operates at a frequency of 13.56MHz. The chip 4 has multiple general-purpose input / output pins and an SPI communication interface; The working principle of the above technical solution is as follows: The impedance matching circuit of the antenna adopts an LC resonant network. By adjusting the values ​​of capacitor and inductor, the antenna achieves good matching with the chip output impedance at a frequency of 13.56MHz, thereby improving signal transmission efficiency. Chip 4 serves as the system core, integrating a complete NFC protocol stack. It supports the ISO / IEC 14443A standard protocol, operates at a frequency of 13.56MHz, and features low power consumption, making it suitable for applications requiring long-term operation. The chip has multiple general-purpose input / output pins (GPIO) and an SPI communication interface, facilitating data interaction and control signal transmission with external circuits.

[0025] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. A single chip for extending multiple NFC antenna tags, characterized in that, Includes chip (4), with a first antenna (1) and a second antenna (2) symmetrically distributed on the upper and lower sides of chip (4). The first antenna (1) and the second antenna (2) are connected by a metal wire (6), and the first antenna (1) and the second antenna (2) are both connected to chip (4) by a metal wire (7).

2. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, Riveting points (3) are provided between the first metal wire (6) and the second metal wire (7), between the upper end of the second metal wire (7) and the first antenna (1), and between the lower end of the second metal wire (7) and the second antenna (2).

3. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, The test points of the chip (4) are printed with defective ink dots (5).

4. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, Both the first antenna (1) and the second antenna (2) are aluminum planar spiral structures.

5. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, The first antenna (1) and the second antenna (2) are both mounted on the insulating substrate (8), and the chip (4) is fixed on the insulating substrate (8) by conductive adhesive.

6. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, The chip (4) is encapsulated with a protective layer made of epoxy resin or UV adhesive, and its thickness is 50-100μm.

7. The method for extending multiple NFC antenna tags onto a single chip according to claim 5, characterized in that, The insulating substrate (8) is pre-attached to the roll (9).

8. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, The impedance matching circuits of the first antenna (1) and the second antenna (2) both adopt LC resonant networks.

9. The method for extending multiple NFC antenna tags onto a single chip according to claim 1, characterized in that, The chip (4) integrates a complete NFC protocol stack, supports the ISO / IEC14443A standard protocol, and operates at a frequency of 13.56MHz.

10. A single chip extending multiple NFC antenna tags according to claim 1, characterized in that, The chip (4) has multiple general-purpose input / output pins and an SPI communication interface.

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