Power dividing principle-based radio frequency identification tag

Abstract

The invention discloses a power dividing principle-based radio frequency identification tag. The power dividing principle-based radio frequency identification tag comprises a dielectric substrate, a metal base structure on the back surface of the dielectric substrate, and a micro-strip radio frequency identification tag structure on the front surface of the dielectric substrate, wherein the micro-strip radio frequency identification tag structure is composed of two micro-strip transmission lines, two micro-strip short lines and a square ring-shaped metal micro-strip line for mainly achieving power dividing and combining functions; a first resonant structure unit, a second resonant structure unit, a third resonant structure unit and a fourth resonant structure unit which are printed onto the dielectric substrate are respectively provided with an open gap, and by controlling connection and closing of the four open gaps, a radio frequency identification tag function can be achieved. The power dividing principle-based radio frequency identification tag can be applied to various electronic instruments and communication systems and has the advantages of being simple and compact in structure, convenient to integrate, free from frequency shift and capable of easily achieving multi-bit coding by changing the number of power divisions.

Description

technical field [0001] The invention belongs to the field of radio frequency circuits and systems, and relates to a radio frequency identification tag. Background technique [0002] Radio frequency identification is a technology that uses radio frequency signals to automatically identify targets and obtain relevant information. In recent years, with the development of technologies such as large-scale integrated circuits, network communications and information security, the application of radio frequency identification technology has received more and more attention. Compared with other identification systems, radio frequency identification systems have many advantages. Not only does the identification work require no human intervention, but it can also be used in various environments and has a long service life. Therefore, radio frequency identification technology has been fully developed all over the world. [0003] At present, radio frequency identification technology has...

AI Technical Summary

Problems solved by technology

Its advantage is that it realizes four-bit encoding in a relatively narrow bandwidth, which improves the utilization rate of the spectrum, but there is a large coupling between the encoded bits, and the frequency offset is relatively large

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