Embedded loop type RFID tag

Abstract

The utility model discloses an embedded loop type RFID tag, and relates to the technical field of RFID tags. Comprising an antenna and a chip, and the chip is connected above the antenna through a conductive adhesive; the antenna is in a sheet shape, an opening is formed in the middle of the antenna, a connecting arm is arranged in the opening, a binding area is arranged in the middle of the connecting arm, and the binding area is used for being connected with a chip; a loop loop area is formed in the opening and located on the inner side of the connecting arm, and a radiation area is formed on the antenna and located on the outer side of the loop loop area. According to the utility model, during working, the tag antenna innovatively adopts a loop loop area embedded antenna design and a loop loop area overall embedded design, and the loop loop area is provided with different embedded depths, so that the far and near field frequency point adjustment and performance optimization of the tag can be realized.

Description

Technical Field

[0001] This utility model relates to the field of RFID tag technology, and in particular to an embedded loop RFID tag. Background Technology

[0002] Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology that automatically identifies target objects and acquires relevant data through spatial coupling (alternating magnetic field or electromagnetic field) to achieve the purpose of target identification and data exchange. The identification work does not require human intervention.

[0003] The basic working principle of RFID technology is not complicated: after the tag enters the magnetic field, it receives the radio frequency signal emitted by the RFID reader and sends out the product information stored in the chip (PassiveTag) by using the energy obtained by the induced current, or actively sends a signal of a certain frequency (ActiveTag); after the reader reads and decodes the information, it sends it to the central information system for relevant data processing.

[0004] With the continuous development of RFID technology, RFID products are gradually being applied to various industries. Simultaneously, the requirements for the far-field and near-field reading performance of tags are becoming increasingly stringent. While existing UHF RFID tags can meet the requirements for far-field communication and inventory reading, they have significant shortcomings in near-field communication. During production testing, weak near-field performance leads to poor coding stability, resulting in a higher coding failure rate and severely impacting production efficiency and product quality. In practical use, facing the demands for stable near-range testing and reading communication—for example, verifying the rapid and accurate reading of tag information at close range (less than 33cm) during inventory inspection, or accurately identifying medical equipment and fixed assets at close range—existing tags often struggle to meet these requirements. Communication interruptions and data reading errors occur frequently, significantly limiting the application of UHF RFID tags in scenarios with extremely high near-field communication requirements.

[0005] Existing UHF tags consist of a substrate, a front-facing metal antenna, conductive adhesive, and a chip. The front-facing metal antenna is attached to the substrate, and the conductive adhesive is located above the metal antenna, connecting the metal antenna and the chip. Conventional RFID UHF tags obtain energy by receiving electromagnetic waves to activate themselves and radiate electromagnetic waves in a fixed direction for radio frequency information transmission and communication.

[0006] like Figure 2As shown, conventional RFID UHF tags adopt a loop + radiation area structure. The main optimization of chip and antenna matching is achieved by adjusting the size of the loop area. This single adjustment method results in weak product competitiveness and fails to meet the actual requirements of near and far field performance. Utility Model Content

[0007] To address the above problems, this utility model provides an embedded loop RFID tag that is simple in structure, easy to process, and has improved adaptability.

[0008] The technical solution of this utility model is: an embedded loop RFID tag, including an antenna and a chip, wherein the chip is connected above the antenna by conductive adhesive;

[0009] The antenna is sheet-shaped with an opening in the middle. A connecting arm is provided inside the opening, and a bonding area is provided in the middle of the connecting arm. The bonding area is used to connect the chip.

[0010] The opening forms a loop region inside the connecting arm, and the antenna forms a radiation region outside the loop region.

[0011] The opening is rectangular, triangular, or trapezoidal.

[0012] The connecting arm can be straight, arc-shaped, or wavy.

[0013] The embedding depth of the loop area ranges from 5 to 50 mm.

[0014] The radiation zone is provided with at least one rectangular opening slot.

[0015] The binding area has an embedded notch.

[0016] The antenna has a length of 5–100 mm, a height of 5–100 mm, and a linewidth of 0.2–5 mm.

[0017] In operation, this utility model innovatively adopts an antenna design embedded in the loop area of ​​the tag antenna. The loop area is embedded as a whole, and different embedding depths are set in the loop area to realize the adjustment of the tag's near and far field frequency points and performance optimization. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the existing technology;

[0020] In the diagram, 1 is the antenna, 2 is the opening, 3 is the connecting arm, 4 is the bonding area, 5 is the loop area, 6 is the radiation area, 7 is the rectangular opening slot, and 8 is the embedded notch. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figure 1 As shown, an embedded loop RFID tag includes an antenna 1 and a chip, wherein the chip is connected above the antenna by conductive adhesive;

[0025] The antenna 1 is sheet-shaped, with an opening 2 in the middle, a connecting arm 3 inside the opening, and a bonding area 4 in the middle of the connecting arm 3 for connecting a chip.

[0026] The opening forms a loop region 5 inside the connecting arm, and the antenna forms a radiation region 6 outside the loop region.

[0027] The tag antenna in this invention innovatively adopts an embedded antenna design within the loop area. The entire loop area is embedded within the design, with an embedding depth ranging from 5 to 50 mm, enabling adjustment of the tag's near and far-field frequency points and performance optimization. This method can achieve near and far-field antenna frequency adjustment and can replace conventional frequency adjustment by adjusting the size of the loop area.

[0028] The opening 2 can be rectangular, triangular, or trapezoidal. Different shapes can be set as needed.

[0029] The connecting arm 3 can be straight, arc-shaped, or wavy. Different shapes can be set as needed.

[0030] The embedding depth of the loop area 5 ranges from 5 to 50 mm.

[0031] The radiation zone is provided with at least one rectangular opening slot 7, which can reduce the area and lower the cost.

[0032] The binding area has an embedded notch 8, which can be used in conjunction with the embedded loop area for performance adjustment.

[0033] The antenna has a length of 5–100 mm, a height of 5–100 mm, and a linewidth of 0.2–5 mm.

[0034] The innovative design of the loop area utilizes regular (rectangular, etc.) or irregular (irregular) lines to better meet industry needs and achieve label diversification. It also allows for reduction in label size and changes in shape, expanding the label's application range.

[0035] The loop area has a linewidth of 0.2~5mm and a length of 0.2~100mm. This ensures that the loop area can perform corresponding impedance adjustments, achieve conjugate matching with different chips, optimize loop antenna performance, and broaden the range of compatible chips for the tag.

[0036] The radiation zone adopts a patch structure design, which can increase the tag bandwidth (increase the antenna bandwidth to 80-120MHz) and improve the tag's resistance to media, so as to reduce the impact of changes in media materials on its reading range performance.

[0037] The common chips connected to RFID tags are: Ucode9, Ucode8, Ucode7 series, M700 series, MonzaR6, Monza 5, Monza 4, H3, H4, H9, 7XGB series, and FM13 series.

[0038] This utility model is simple and easy to understand and use, and has the following advantages:

[0039] 1) It features both near-field and far-field performance, making it easy to match with chips of different impedances. It is suitable for various application environments and facilitates application expansion.

[0040] 2) This tag contains a loop area and a radiation area. Performance can be adjusted directly through the embedding of the loop area, offering strong design flexibility. In application, in addition to the complete embedding of the loop area, the embedding can also be adjusted by setting an embedding notch in the binding area.

[0041] 3) The appearance of the antenna loop area can be regular or irregular, and by adopting different line widths and line shapes, the antenna impedance can be adjusted to match the chip, which has strong chip applicability.

[0042] 4) By using a patch design in the radiating area, the antenna bandwidth can be effectively increased (bandwidth can reach 80-120MHz), ensuring the tag's near and far field performance while having strong resistance to dielectrics.

[0043] This utility model has wide applicability, improves economic efficiency, and has strong practicality.

[0044] Regarding the information disclosed in this case, the following points need to be clarified:

[0045] (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design.

[0046] (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments;

[0047] The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. An embedded loop RFID tag, comprising an antenna and a chip, wherein the chip is connected above the antenna by conductive adhesive; Its features are, The antenna is sheet-shaped with an opening in the middle. A connecting arm is provided inside the opening, and a bonding area is provided in the middle of the connecting arm. The bonding area is used to connect the chip. The opening forms a loop region inside the connecting arm, and the antenna forms a radiation region outside the loop region.

2. The embedded loop RFID tag according to claim 1, characterized in that, The opening is rectangular, triangular, or trapezoidal.

3. An embedded loop RFID tag according to claim 1 or 2, characterized in that, The connecting arm can be straight, arc-shaped, or wavy.

4. The embedded loop RFID tag according to claim 1, characterized in that, The embedding depth of the loop area ranges from 5 to 50 mm.

5. The embedded loop RFID tag according to claim 1, characterized in that, The radiation zone is provided with at least one rectangular opening slot.

6. The embedded loop RFID tag according to claim 1, characterized in that, The binding area has an embedded notch.

7. An embedded loop RFID tag according to claim 1, characterized in that, The antenna has a length of 5–100 mm, a height of 5–100 mm, and a linewidth of 0.2–5 mm.

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