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A chipless RFID tag based on CSRR

An RFID tag and chipless technology, which is applied to record carriers, instruments, and calculations used by machines, can solve the problem of low coding density of tags, and achieve the effects of improving coding density, high coding digits, and reducing tag area

Inactive Publication Date: 2019-06-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention proposes a chipless RFID tag based on CSRR, which solves the problem of low tag coding density

Method used

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  • A chipless RFID tag based on CSRR
  • A chipless RFID tag based on CSRR
  • A chipless RFID tag based on CSRR

Examples

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Embodiment 1

[0032] A chipless RFID tag based on CSRR, including a dielectric board, a coupled microstrip line arranged on one side of the dielectric board, and a microstrip resonant unit arranged on the other side of the dielectric board

[0033] In this embodiment, the dielectric constant of the dielectric substrate is 3.66, the thickness is set to 0.787 mm, and the loss tangent value is 0.004.

[0034] In this embodiment, the microstrip resonant unit includes four nested microstrip resonators, and each microstrip resonant unit is a regular hexagonal structure with one side opening and the openings facing the same direction. The openings of each microstrip resonator unit have different lengths.

[0035] In this embodiment, the outer length of the first microstrip resonator is 4mm, and the inner length is 3.65mm; the outer length of the second microstrip resonator is 3.4mm, and the inner length is 3.1mm; the third microstrip resonator The outer side length of the resonator is 2.9mm and t...

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Abstract

The invention provides a chipless RFID tag based on a CSRR. The chipless RFID tag includes a dielectric plate, ta coupling microstrip line arranged on one surface of the dielectric plate, and a micro-strip resonance unit arranged on the other surface of the dielectric plate; the micro-strip resonance unit comprises a plurality of nested micro-strip resonators; wherein each micro-strip resonant unit is of a regular hexagon structure with an opening in one side and an opening in the same direction, specific digit coding is achieved by setting the specific number of the micro-strip resonators, each micro-strip resonator is set to be in a resonant or short-circuit state to achieve two-digit coding, and the characteristic impedance of the coupling micro-strip line is 50 ohm. According to the invention, the capacity expansion of the chipless tag is realized by increasing the number of the micro-strip resonators, and the expandability is flexible. By reducing the interval between the resonantfrequencies generated by the microstrip resonators, the capacity of the chipless RFID tag can be improved by maximizing the number of the resonators within a specific frequency range.

Description

technical field [0001] The invention relates to radio frequency identification electronic tag technology, in particular to a chipless RFID tag based on CSRR. 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 narr...

Claims

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Application Information

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IPC IPC(8): G06K19/067
Inventor 吴礼李玉年彭树生高辉肖芸盛俊铭毕业昆卞亨通彭立尧
Owner NANJING UNIV OF SCI & TECH
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