Three-dimensional split ring resonator metamaterial radio frequency identification tag

A metamaterial, three-dimensional technology, applied in the field of sub-gigahertz low-profile 3DSRR metamaterials, can solve problems such as limited applications

Inactive Publication Date: 2019-06-04
HKUST SHENZHEN RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The component sizes of this metamaterial are in the order of wavelength, limiting its use in sub-GHz applications

Method used

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  • Three-dimensional split ring resonator metamaterial radio frequency identification tag
  • Three-dimensional split ring resonator metamaterial radio frequency identification tag
  • Three-dimensional split ring resonator metamaterial radio frequency identification tag

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Embodiment Construction

[0026] Below in conjunction with the embodiments, the low-profile three-dimensional split ring resonator metamaterial radio frequency identification tag of the present invention will be further described:

[0027] As shown in Table 1, for the same resonance frequency, the size of the three-layer 3D SRR is only one third of that of the three-layer SRRR.

[0028]

[0029] SRR is one of the most important metamaterial component structures. The metamaterial unit itself acts as the subject of radio wave radiation. Electromagnetic metamaterials are composite materials with specific electromagnetic properties engineered at the subwavelength scale. By carefully designing metamaterial units, functions beyond conventional ones can be achieved. Metallic environmental impact is one of the biggest challenges in RFID applications. The unit metamaterial is used as an RFID antenna, and in order to lower the resonance frequency, the internal capacitance and inductance need to be increase...

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Abstract

The invention relates to a sub-gigahertz (Sub-GHz) low-profile 3D SRR (three-dimensional split ring resonator) metamaterial for increasing the radio frequency identification range. The metamaterial iscomposed of periodically placed sub-wavelength structures to generate a specific effect on incident electromagnetic waves. Generally, the electromagnetic metamaterials are 1/2 wavelength scales, while these metamaterials are typically used for high frequency applications from 10 GHz to 20 GHz. According to the application of sub-GHz, the unit size is actually too large, and the application of metamaterial in sub-GH is limited; The invention provides an innovative low-profile ultra-low frequency material design for a UHF (ultra-high frequency) RFID (radio frequency identification) tag. The tagworks from 860 MHz to 960 MHz. The metamaterial is an innovative 3D SRR (three-dimensional split ring resonator) structure. The 3D SRR structure achieves the expected ultra-low frequency specific effect through the design, simulation and test of the model. As the metamaterial can inhibit propagation of surface waves, the metamaterial is also very high in radiation efficiency.

Description

technical field [0001] The present invention relates to a sub-gigahertz (Sub-GHz) low-profile 3D SRR (three-dimensional split ring resonator) metamaterial for increasing radio frequency identification range. For UHF (ultra-high frequency) RFID (radio frequency identification) tag applications, the reading range of the tag is superior to that of existing radio frequency identification (RFID) tags. Background technique [0002] Radio frequency identification (RFID) tags attached to objects have many uses. RFID tags have an antenna, usually of the dipole type. The antenna is commonly used to transmit or receive ultra high frequency (UHF) signals, and the RFID tag antenna communicates with the antenna of the RFID data reader to read power and data data. Radio frequency identification (RFID) tags are attached to objects to be tracked. The electromagnetic properties of an object affect the impedance, bandwidth, and radiation efficiency of a radio frequency identification (RFID)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077
Inventor 袁铭辉孙倩萌陈景朗
Owner HKUST SHENZHEN RES INST
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