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Radio frequency tag identification and near field communication system based on planar magnetic metamaterial

A technology of MET materials and radio frequency tags, which is used in near-field transmission systems, transmission systems, electromagnetic radiation induction, etc., can solve the problems of different application scope and functions, improve energy and signal transmission efficiency, and is conducive to miniaturization , the effect of improving the signal recognition rate

Inactive Publication Date: 2016-05-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the scope of application and function of the patent are not the same
This patent is mainly used in the field of wireless charging. The transmitting end and the receiving end need to be loaded with the same area of ​​MET material to improve the efficiency of wireless energy transmission; this patent is mainly used in the fields of radio frequency tag identification and near field communication, mainly to improve the efficiency of signal transmission , can also have the function of wireless charging, but this function is optional and not the main purpose

Method used

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  • Radio frequency tag identification and near field communication system based on planar magnetic metamaterial
  • Radio frequency tag identification and near field communication system based on planar magnetic metamaterial
  • Radio frequency tag identification and near field communication system based on planar magnetic metamaterial

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A radio frequency tag identification system based on magnetic material to control the magnetic field intensity and field distribution, its structure is as follows Figure 1-3 As shown, it is mainly composed of a signal transmitting coil 1, a magnetic material 2 at the transmitting end, a magnetic material 3 at the receiving end, and a coil 4 at the receiving end. The magnetic material 2 at the transmitting end and the magnetic material 3 at the receiving end are respectively located at the center of the signal transmitting coil 1 and the coil 4 at the receiving end, and the magnetic material 2 at the transmitting end and the magnetic material 3 at the receiving end perform signal transmission due to magnetic resonance ; The magnetic material 2 at the transmitting end and the magnetic material 3 at the receiving end have the maximum real part of the equivalent magnetic permeability at the operating frequency of the system. Both the signal transmitting coil 1 and the rece...

Embodiment 2

[0041] The radio frequency tag identification and near-field communication system based on planar magnetite materials is used for miniaturized radio frequency tag identification and near-field communication technology working at 13.56MHz. The receiver coil is composed.

[0042] Wherein, the signal transmitting coil is provided with a transmitting-end magnetic material, and the receiving-end coil is provided with a receiving-end magnetic material. The magnetic material of the transmitting end and the magnetic material of the receiving end can be processed by printed circuit board technology. The magnetic material at the transmitting end is composed of the first dielectric plate, the first metal copper spiral ring at the transmitting end etched on the upper and lower surfaces of the first dielectric plate, and the second metal copper spiral ring at the transmitting end. The first metal copper spiral ring The second metal copper spiral ring at the transmitting end is parallel to...

Embodiment 3

[0047] The radio frequency tag identification and near-field communication system based on planar magnetite materials is used for miniaturized radio frequency tag identification and near-field communication technology working at 13.56MHz. The receiver coil is composed.

[0048] Wherein, the signal transmitting coil is provided with a transmitting-end magnetic material, and the receiving-end coil is provided with a receiving-end magnetic material. The magnetic material of the transmitting end and the magnetic material of the receiving end can be processed by printed circuit board technology. The magnetic material at the transmitting end is composed of the first dielectric plate, the first metal copper spiral ring at the transmitting end etched on the upper and lower surfaces of the first dielectric plate, and the second metal copper spiral ring at the transmitting end. The first metal copper spiral ring The second metal copper spiral ring at the transmitting end is parallel to...

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Abstract

The invention relates to a radio frequency tag identification and near field communication system based on a planar magnetic metamaterial, and the main work frequency is 13.4-13.7 MHz. The system is formed by a signal transmitting coil (1) and a receiving terminal coil (4) connected with a radio frequency tag and near field communication chip, a transmitting terminal magnetic metamaterial (2) is arranged in the signal transmitting coil (1), and a receiving terminal magnetic metamaterial (3) is arranged in the receiving terminal coil (4). Compared with the prior art, according to the radio frequency tag identification and near field communication system, the transmission efficiency of electromagnetic energy and signals is improved by employing two planar magnetic metamaterial parts with the same resonant frequency in the magnetic field resonance with the same frequency range, the system can effectively receive the signals when the position of a receiving terminal has certain dislocation and declination, the magnetic field generated by the magnetic metamaterial in the system is relatively flat and uniform, simultaneous transmission of the signals via multiple receiving terminals is facilitated, and the identification and communication efficiency is improved.

Description

technical field [0001] The invention relates to a radio frequency tag identification and near-field communication system, in particular to a radio frequency tag identification and near-field communication system based on planar magnetite materials that regulates magnetic field strength and field distribution. Background technique [0002] Radio Frequency Identification (RFID) is a technology that uses radio frequency signals to automatically identify target objects and obtain relevant information. The earliest applications of RFID can be traced back to the identification system used to distinguish friendly and enemy aircraft in World War II. At present, RFID has become a research hotspot. It has the advantages of high efficiency, fast, reliable, non-line-of-sight reading, and can work in harsh environments. It is widely used in the fields of data collection and commodity identification. [0003] At present, the mechanism of many RFIDs is: a high-frequency magnetic field wil...

Claims

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Application Information

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IPC IPC(8): G06K7/10G06K19/077H04B5/00
CPCG06K7/10178G06K19/07749H04B5/00Y02D30/70
Inventor 李云辉陈梓漳吴谦刘志扬陈永强方恺张冶文陈鸿
Owner TONGJI UNIV
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