Small RFID anti-metal label

Abstract

The invention discloses a small RFID anti-metal label. The small RFID anti-metal label comprises a rectangular dielectric substrate and a chip fixed on the dielectric substrate, wherein copper foils are arranged on the top surface and the bottom surface of the dielectric substrate to form a first radiating surface and a second radiating surface, and the second radiating surface is parallel to thefirst radiating surface; the first radiating surface is provided with a gap to divide the first radiating surface into a left part and a right part, and the chip is connected with the left part and the right part of the first radiating surface; copper foils are symmetrically arranged on the two sides of the substrate to form a third radiating surface and a fourth radiating surface; and the third radiating surface and the fourth radiating surface are connected with the first radiating surface and the second radiating surface to form a closed loop.

Description

technical field [0001] The invention relates to the field of RFID electronic tags, in particular to a small RFID anti-metal tag. Background technique [0002] Radio frequency identification, RFID technology, also known as radio frequency identification, is a communication technology that can identify specific targets and read and write related data through radio signals without the need for mechanical or optical contact between the identification system and specific targets. With the development of radio frequency identification technology, RFID technology has been gradually used in libraries, logistics warehousing, traffic management, food hygiene and safety, retail industry, military and other fields. And there is a tendency to extend to all walks of life. [0003] The UHF-RFID tag antenna works by receiving electromagnetic waves of a certain energy. These electromagnetic waves are sent out by the UHF-RFID reader through the reader antenna and propagate in the air. In re...

AI Technical Summary

Problems solved by technology

However, when it is pasted or installed on a metal surface, its reading distance is very small or there is no reading distance;

[0007] 3. Use high dielectric constant substrates to make monopole antennas. When this antenna is attached to a metal surface, it still has a good reading distance. This antenna is generally etched or silver paste on the dielectric material. It is processed by printing process, and its cost is relatively high

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