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A multi-bit chip-less tag

A chipless, multi-bit technology, applied in instruments, computing, record carriers used by machines, etc., can solve the problems of small capacity of helical resonance encoding, and achieve the effects of weakened coupling phenomenon, high coincidence, and strong resonance energy.

Inactive Publication Date: 2019-01-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a multi-bit chipless label to solve the problem of small capacity of spiral resonance encoding

Method used

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  • A multi-bit chip-less tag
  • A multi-bit chip-less tag
  • A multi-bit chip-less tag

Examples

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Embodiment 1

[0031] A multi-bit chipless tag, including a dielectric board, a coupled microstrip line arranged on the dielectric board, and several microstrip resonators distributed on different sides of the coupled microstrip line, each microstrip resonator consists of two The C-shaped resonant rings are embedded and combined. The inner C-shaped resonant ring is buckled in the outer C-shaped resonant ring, and the opening is facing the bottom of the outer C-shaped resonant ring. At the resonance point, the inner and outer rings of the microstrip resonator are respectively set to resonance or short-circuit state to realize two-bit coding, and several microstrip resonators are combined and arranged on different sides of the microstrip line to realize several-bit coding. The coupled microstrip line The characteristic impedance is 50Ω.

[0032] In this embodiment, the dielectric constant of the dielectric substrate is 2.55, the thickness is set to 0.787mm, and the loss tangent value is 0.0019...

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Abstract

The invention provides a multi-bit chip-free tag, and relates to the field of radio frequency identification electronic tags, in particular comprising a dielectric plate, a coupled microstrip line disposed on the dielectric plate, and a plurality of microstrip resonators distributed on opposite sides of the coupled microstrip line, each microstrip resonator is formed by embedding two C-shaped resonant rings into one another, generating two resonant points, setting the inner and outer rings of the microstrip resonator to a resonant state or a short-circuit state respectively to realize two-bitcoding, and arranging several microstrip resonators on opposite sides of the microstrip line to realize several-bit coding, wherein the characteristic impedance of the coupled microstrip line is 50 Omega. The invention can realize two-bit encoding through a unit resonator, thereby improving encoding capacity and reducing label area.

Description

technical field [0001] The present invention relates to the field of radio frequency identification electronic tags, in particular to a multi-bit chipless tag. Background technique [0002] Radio Frequency Identification (RFID) is mainly used in various application areas such as logistics, commerce, industry, and healthcare, playing an important role in the Internet of Things. Compared with other automatic identification technologies, it has the advantages of non-contact work, not easy to damage, does not require manual intervention, and can realize high-speed moving objects and multi-target identification. RFID chipless tags make up for the shortcomings of barcodes in reading distance and automatic identification. [0003] The disadvantage of the chipless tag based on time domain reflection is that the recognition distance is relatively long, and it has a high dependence on the time domain analysis of the signal; the encoding method of the hybrid chipless tag occupies a na...

Claims

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Application Information

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IPC IPC(8): G06K19/067
CPCG06K19/067
Inventor 吴礼张亚曦施嘉琪彭树生高宗彦曹迪
Owner NANJING UNIV OF SCI & TECH
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