A kind of RFID high-frequency antenna based on transparent flexible substrate and its preparation process

Abstract

The invention discloses an RFID high-frequency antenna based on a transparent flexible substrate and a preparation process, which belongs to the technical field of electronic tags, and solves the problems of low transparency, poor directional radiation, complicated process and low product quality of the RFID antenna in the prior art. It includes an insulating transparent substrate layer and an antenna radiation structure. The antenna radiation structure is arranged on the surface of the substrate layer. The antenna radiation structure includes a conductive pattern unit, a circuit connection unit and a positioning arm. The conductive pattern unit includes a first substructure, a second substructure and third substructure. In the present invention, the line width of the conductive pattern unit is small, and the transparent and soft base material is used to make the antenna transparent as a whole. The ends of the first substructure and the second substructure are disconnected to realize directional radiation and reduce mutual coupling interference. The unique way of connecting with the circuit connection unit on the same plane, combined with the single-side printing and single-side etching process to prepare the antenna, simplifies the preparation of the antenna and reduces the material consumption.

Description

technical field [0001] The invention belongs to the technical field of electronic tags, and in particular relates to an RFID high-frequency antenna based on a transparent flexible substrate and a preparation process. Background technique [0002] Compared with identification technologies such as bar codes and smart cards, radio frequency identification technology has obvious advantages. RFID can automatically identify labels attached to different objects, and conduct wireless communication through electromagnetic transmission between labels and readers. The identification distance is relatively long, and labels and readers There can be obstacles between them to achieve non-line-of-sight detection, but barcodes and smart cards must be accurately placed in designated positions, and automatic identification cannot be realized. The reading distance of the barcode is very short without any occlusion, while the smart card requires direct contact between the card and the reader. In...

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Problems solved by technology

[0002] Compared with identification technologies such as bar codes and smart cards, radio frequency identification technology has obvious advantages. RFID can automatically identify labels attached to different objects, and conduct wireless communication through electromagnetic transmission between labels and readers. The identification distance is relatively long, and labels and readers There can be obstacles between them, so as to realize non-line-of-sight detection, but the barcode and smart card must be placed in the specified position accurately, and automatic identification cannot be realized

The reading distance of the barcode is very short without any occlusion, while the smart card requires direct contact between the card and the reader. In addition, the RFID reader can quickly identify multiple tags within a certain range, while barcodes and smart cards only Can read one-to-one

[0003] At present, the preparation process of RFID high-frequency antennas on the market is to first cover both sides of the film sheet with metal foil, then use printing or photolithography to print resist ink on the antenna pattern area on both sides of the film sheet, and then etch the antenna to complete the antenna. Processing, double-sided printing and double-sided etching are used in this process. It is necessary to accurately divide the long sleeve printing and connect the starting point of the antenna to ensure the circuit connection. The accuracy of the whole process is not easy to grasp, and the operation is difficult. At the same time, the concentration and intensity of acid spraying are different, resulting in uneven product quality and a large amount of waste materials

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