Metal-resistant super-high frequency radio frequency identification device (RFID) label

Abstract

The invention provides a metal-resistant super-high frequency radio frequency identification device (RFID) label (50). The metal-resistant super-high frequency RFID label (50) comprises a label electric medium part (51), a first annular antenna image (53) and a second annular antenna image (55). The second annular antenna image (55) is continuous from a first surface of the label electronic medium part (51) to a second surface of the label electric medium part (51). And a fracture is formed in the first surface of the label electric medium part (51). The first annular antennal image (53) is located on the second annular antennal image (55) and connected with the second annular antennal image (55) in a couple mode without conducting electricity. An integrity circuit chip (52) is installed on the first annular antenna image (53).

Description

technical field [0001] The present invention relates to an RFID (radio frequency identification) electronic tag, in particular to an electronic tag that can be applied to the surface of a metal material or a non-metal material, and has the advantage of excellent reading distance when it is attached to a metal or non-metal. Background technique [0002] In logistics, asset management, and production operation management, the method of affixing printed barcodes to products or their packaging has been commonly used. However, the problems of this barcode technology are: short reading distance, non-group reading, low reading efficiency, non-renewable information, and cannot be used in many special environments. [0003] Therefore, the current RFID technology realizes the reading and writing of information in a non-contact manner, the reading distance is long, and the group reading function can be realized. It greatly improves the efficiency of reading and writing tags, and it can...

AI Technical Summary

Problems solved by technology

However, the problems of this barcode technology are: short reading distance, non-group reading, low reading efficiency, non-renewable information, and cannot be used in many special environments.

However, when it is pasted or installed on a metal surface, the metal greatly weakens the communication performance of the RFID tag, resulting in the problem that its reading distance is greatly reduced, such as Figure 9 As shown in (b), the root cause is that a current in the opposite direction to the dipole antenna surface current will be generated on the metal surface, which will cancel the electromagnetic field generated by the dipole antenna surface current; the second type is to make a dipole antenna When using a pole antenna, the distance from it to the metal surface is increased to reduce the influence of metal objects on it, such as Figure 9 As shown in (c), this method can reduce the influence of the reverse current on the surface of the metal object and increase its communication distance appropriately, but its communication distance is still reduced compared to when it is not attached to the metal object, and its The bandwidth will be narrowed. When there is a requirement for reading distance or bandwidth, this type of tag has great application limitations; the third type is made into a monopole antenna, such as Figure 10 As shown, when this antenna is attached to a metal surface, it still has good bandwidth and gain. This antenna is generally processed on a dielectric material by etching or silver paste printing, and its cost is relatively high.

Images