High-sensitivity RFID chip with ultra-long reading distance

Abstract

This utility model discloses a high-sensitivity, ultra-long-range RFID chip, comprising a PET substrate, an antenna, and a chip. The antenna, made of aluminum foil, is etched onto the PET substrate. The antenna includes a rectangular body with a hollowed-out radiating area in the middle. Below the radiating area is a feed port that isolates the antenna. A conductive adhesive layer is coated at the feed port. The chip, conductive adhesive layer, and feed port are fixedly connected by hot pressing. Symmetrical rectangular signal enhancement areas are located at both ends of the body. The signal enhancement areas are integrally formed with the body and located below the body. A long strip-shaped binding and positioning detection groove is located at the bottom of the body corresponding to the feed port. By adopting this solution, the original thick-wire bent antenna is adjusted to a planar antenna, which enhances the signal. At the same time, with the help of signal enhancement from the radiating area and the signal enhancement area, the sensitivity and reading distance of the RFID chip are improved, with a maximum reading distance of 8 to 10 meters.

Description

Technical Field

[0001] This utility model relates to the field of RFID chips for clothing, and in particular to a high-sensitivity RFID chip with an ultra-long reading distance. Background Technology

[0002] RFID (Radio Frequency Identification) technology, simply put, uses radio signals to identify specific targets and read / write related data without human intervention. The RFID chip tag on clothing consists of an antenna and a chip. The chip stores information such as the product's unique code, production date, size, and color. When the RFID chip tag enters a magnetic field, it can transmit the product information stored in the chip using the energy obtained from the induced current, achieving contactless data exchange. A common RFID chip tag antenna structure is shown below. Figure 1 As shown, the main body 1 adopts a design with thick lines and bends, and the chip 2 is fixed on the main body. RFID chip tags made using the above design can be read by handheld UHF RFID readers at a relatively short distance, generally between 1.5 and 5 meters.

[0003] The applicant found in practice that, due to limitations in the sensitivity and reading distance of existing RFID chip tags, employees frequently encountered situations where data could not be read or was incompletely read when using handheld UHF RFID readers for warehouse and store inventory checks. To ensure accuracy, manual verification and checking of inventory was required, which increased the workload of employees and reduced efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a high-sensitivity, ultra-long-range readout RFID chip.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-sensitivity, ultra-long reading distance RFID chip, comprising a PET substrate, an antenna, and a chip; the antenna, made of aluminum foil, is etched onto the PET substrate; the antenna comprises a rectangular body with a hollowed-out radiation area in the middle; a feed port for antenna isolation is provided below the radiation area; a conductive adhesive layer is coated at the feed port; the chip, conductive adhesive layer, and feed port are fixedly connected by hot pressing; symmetrical rectangular signal enhancement areas are provided at both ends of the body; the signal enhancement areas are integrally formed with the body and located below the body; a long strip-shaped binding positioning detection groove is provided at the bottom of the body corresponding to the feed port.

[0006] By adopting this solution, the original thick-wire bent antenna is replaced with a planar antenna, which enhances the signal. Simultaneously, the signal is amplified through the radiation zone and signal enhancement zone, improving the sensitivity and reading distance of the RFID chip. The RFID chip manufactured in this application can achieve a maximum reading distance of 8 to 10 meters. Fixed positioning of the chip can be achieved through the radiation zone and the binding positioning detection slot. The high-sensitivity, ultra-long-read RFID chip features a simple and robust structure, simple manufacturing and processing, low cost, and ease of mass production.

[0007] A further improvement is that the short side of the antenna body and the long side of the signal enhancement area are aligned on the same straight line. Aligning them on the same line ensures the integrity of the antenna body's boundary at the joint, indirectly improving antenna performance.

[0008] Further improvements include a main body with a long side of 48-52mm and a short side of 14-16mm; a radiation zone with a long side of 14-16mm and a short side of 8.5-6.5mm; and a signal enhancement zone with a long side of 14-16mm and a short side of 9-11mm. Antennas using this structure achieve a sensitivity and readout distance of 8 to 10 meters.

[0009] Further improvements include: the main body's long side is 50mm, and its short side is 15mm; the radiating area's long side is 15mm, and its short side is 7.5mm; the signal enhancement area's long side is 15mm, and its short side is 10mm; and the feed port spacing is 0.13mm. Antennas employing this structure achieve optimal performance in both sensitivity and readout distance.

[0010] Further improvements include using either a one-time implantable chip or a rewritable chip. A one-time implantable chip can only store information about a single type of clothing; a rewritable chip allows for compatibility with different clothing items or information.

[0011] Further improvements include symmetrical positioning protrusions on both sides of the power supply port; the aluminum foil antenna is etched to create a binding positioning detection groove within the radiation area. These positioning protrusions enable precise positioning of the chip. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the antenna and chip of an existing RFID chip.

[0013] Figure 2 This is a schematic diagram of the antenna of a high-sensitivity, ultra-long readout RFID chip.

[0014] Figure 3 This is a schematic diagram of the structure of a high-sensitivity RFID chip with an ultra-long reading distance. Detailed Implementation

[0015] The preferred embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] like Figures 1 to 3 As shown, a high-sensitivity, ultra-long-range RFID chip includes a PET substrate 1, an antenna 2, and a chip 3; the chip is a disposable chip or an erasable and rewritable chip. The antenna, made of aluminum foil, is etched onto the PET substrate; the antenna includes a rectangular body 21 with a hollowed-out radiating area 22 in the middle; a feed port 23 is located below the radiating area to isolate the antenna; a conductive adhesive layer 4 is coated at the feed port; the chip, conductive adhesive layer, and feed port are fixedly connected by thermoforming; symmetrical rectangular signal enhancement areas 24 are located at both ends of the body; the signal enhancement areas are integrally formed with the body and located below the body; and the short side of the body and the long side of the signal enhancement area are on the same straight line. A long strip-shaped binding and positioning detection groove 25 is located below the body corresponding to the feed port. Symmetrical positioning protrusions are located on both sides of the feed port; the aluminum foil antenna is etched and bound to the positioning detection groove and the radiating area. This application preferably uses laser etching technology for processing and manufacturing.

[0017] The main body has a long side of 48-52mm and a short side of 14-16mm; the radiating area has a long side of 14-16mm and a short side of 8.5-6.5mm; the signal enhancement area has a long side of 14-16mm and a short side of 9-11mm. The preferred antenna structure has the following dimensions: main body long side 50mm, main body short side 15mm; radiating area long side 15mm, radiating area short side 7.5mm; signal enhancement area long side 15mm, signal enhancement area short side 10mm; and feed port spacing of 0.13mm.

[0018] The working principle of this invention is as follows: First, handheld RFID readers can be installed inside stores or fitting rooms. Since each garment corresponds to a garment tag equipped with a highly sensitive RFID chip with an ultra-long reading distance, it can achieve excellent efficiency in daily inventory, inbound and outbound operations, and information tracking. It can also reduce the workload of sales staff so as to provide better service. The handheld RFID readers can detect customers' actions of trying on or picking up a garment in real time. Combined with big data analysis, it can understand the status of best-selling and unsold products. At the same time, it can also effectively analyze fashion trends, allowing stores to adjust their marketing strategies as soon as possible.

[0019] Processing of high-sensitivity, ultra-long-range RFID chips: During RFID chip production, a PET substrate with an aluminum foil antenna is first conveyed via a conveyor belt to the lower part of the dispensing head of the bonding machine. The dispensing machine dispenses adhesive onto the antenna (forming a conductive adhesive layer). Simultaneously, a gripper picks up the chip and places it on the antenna with the conductive adhesive applied. The bonded chip is then conveyed to a hot press head via a control console for hot pressing for 7 seconds, fixing the chip, conductive adhesive layer, and antenna together. After hot pressing, performance testing is performed. If the test is successful, the finished product is wound up. When using the finished chip, the handheld device is kept horizontal to read the chip information; the maximum reading distance can reach over 10 meters.

[0020] The above embodiments are merely preferred embodiments of this utility model, but this embodiment is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall fall within the protection scope of this utility model.

Claims

1. A high sensitivity RFID chip with ultra long read range, comprising a PET substrate (1), an antenna (2) and a chip (3); characterized in that, An antenna made of aluminum foil is set on a PET substrate by etching; the antenna includes a rectangular body (21), with a hollowed-out radiating area (22) in the middle of the body; a feed port (23) is provided below the radiating area to isolate the antenna; a conductive adhesive layer (4) is coated at the feed port; the chip, conductive adhesive layer and feed port are fixedly connected by hot pressing; symmetrical rectangular signal enhancement areas (24) are provided at both ends of the body; the signal enhancement areas are integrally formed with the body and are located below the body; a long strip-shaped binding positioning detection groove (25) is provided at the bottom of the body corresponding to the feed port.

2. The high sensitivity ultra long read range RFID chip of claim 1, wherein: The short side of the main body and the long side of the signal enhancement region are on the same straight line.

3. The high sensitivity RFID chip with ultra long read range according to claim 2, characterized in that: The long side of the main body is 48-52mm, and the short side is 14-16mm; the long side of the radiation area is 14-16mm, and the short side is 8.5-6.5mm; the long side of the signal enhancement area is 14-16mm, and the short side is 9-11mm.

4. The high sensitivity ultra long read range RFID chip of claim 3, wherein: The main body has a long side of 50mm and a short side of 15mm; the radiation area has a long side of 15mm and a short side of 7.5mm; the signal enhancement area has a long side of 15mm and a short side of 10mm; the spacing between the power supply ports is 0.13mm.

5. The high-sensitivity, ultra-long reading distance RFID chip according to any one of claims 1 to 4, characterized in that: The chip can be either a one-time implanted chip or an erasable and rewritable chip.

6. The high-sensitivity, ultra-long reading distance RFID chip according to claim 5, characterized in that: Symmetrical positioning protrusions are provided on both sides of the power supply port; the antenna made of aluminum foil is set in the binding positioning detection slot and radiation area by etching.

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