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
CN109840579AInactive Publication Date: 2019-06-04HKUST SHENZHEN RES INST +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HKUST SHENZHEN RES INST
Publication Date
2019-06-04
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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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