Anti-metal radio frequency identification tag with electrified anti-metasurface

Abstract

The invention discloses an anti-metal wireless radio frequency identification tag with a charged anti-metasurface, belongs to the technical field of wireless radio frequency identification, and aims to solve the performance defects of poor signals, short reading distance and the like of an RFID tag in the prior art in severe and complex electromagnetic environments such as a metal surface and the like. The RFID tag comprises an RFID tag body, a metal circular ring is arranged on a dielectric plate of the RFID tag body, an antenna interface of an RFID chip is welded on the metal circular ring, the metal circular ring inductively couples and feeds a dipole antenna, one end, close to the metal circular ring, of the dipole antenna is bent into an arc-shaped section, and the other end, close to the metal circular ring, of the dipole antenna is welded on the metal circular ring. The arc-shaped section annularly wraps the outer side of the metal circular ring, and a reactance metasurface is arranged below the RFID tag body. The reactance metasurface comprises a dielectric panel, a plurality of metal rectangular patches are arranged on the dielectric panel, and the metal rectangular patches are distributed on the dielectric panel in an array mode. The invention is suitable for the radio frequency identification tag.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification, and in particular relates to a metal-resistant radio frequency identification label with a charged anti-metasurface. Background technique [0002] Due to its advantages of low cost, no need for batteries, high information accuracy, non-contact, and automatic information update, radio frequency identification technology (RFID) is considered to be one of the important building blocks of IoT systems. A radio frequency identification tag usually consists of a tag antenna and an RFID radio frequency chip. Among them, the tag antenna plays a very important role in the entire RFID system as an energy and signal transceiver interface. [0003] When the RFID tag is attached to the metal, the metal will cause a difference of 180 degrees between the incident electromagnetic wave and the reflected electromagnetic wave, and the two superimpose and cancel at the metal, which greatly red...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a metal-resistant radio frequency identification tag with a reactive metasurface to solve the shortcomings of the existing RFID tags in poor metal surfaces, poor signals, and short reading distances in complex electromagnetic environments.

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