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Wireless radio frequency energy collection RFID tag system based on metamaterial

A technology of RFID tags and radio frequency, which is applied in the field of radio frequency electronics, can solve the problems that it is difficult to meet the requirements of wireless sensor network charging miniaturization, inconvenient use, and large antenna shape, so as to save manpower and material resources, achieve filtering effect, and good filtering effect of effect

Pending Publication Date: 2019-07-19
XIDIAN UNIV
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Problems solved by technology

The disadvantages of this system are: the RFID communication antenna and the wireless energy harvesting antenna are designed separately, which makes the system more complicated, and the antenna has a large shape, which is inconvenient to use
The disadvantage of this system is: the wireless power receiver and the radio frequency transmitter are designed separately, the design is complex, and it is difficult to meet the miniaturization requirements of wireless sensor network charging

Method used

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  • Wireless radio frequency energy collection RFID tag system based on metamaterial
  • Wireless radio frequency energy collection RFID tag system based on metamaterial
  • Wireless radio frequency energy collection RFID tag system based on metamaterial

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] The following description is only a specific example of the present invention, and does not constitute any limitation to the present invention. Obviously, for those skilled in the art, after understanding the content and principle of the present invention, it is possible without departing from the principle and structure of the present invention. Various modifications and changes in form and details are made under the circumstances of the invention, but these modifications and changes based on the present invention are still within the protection scope of the claims of the present invention.

[0027] refer to figure 1 , the present invention based on metamaterials wireless radio frequency energy harvesting RFID tag system, including RFID tag antenna 1, RFID chip 2, rectifier circuit 3, energy management circuit 4, microprocessor 5 and sensor 6. in:

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Abstract

The invention discloses a wireless radio frequency energy collection RFID tag system based on a metamaterial. The system comprises an RFID tag antenna, an RFID chip, a rectifying circuit, an energy management circuit, a microprocessor and a sensor. The rectifying circuit is connected with the energy management circuit; the energy management circuit is respectively connected with the RFID chip, themicroprocessor and the power supply end of the sensor; two output ends of the RFID tag antenna are respectively connected with a radio frequency signal of the RFID chip and an input end of the rectifying circuit; the microprocessor is respectively connected with the RFID chip and the sensor; the RFID tag antenna comprises a split ring resonator metasurface, a dielectric substrate and a groundingcopper layer, the metasurface adopts three split rings made of metamaterials and embedded at equal intervals, the opening difference between an outer ring and a middle ring is 180 degrees, and an opening of an inner ring is determined by load impedance; and the rectifying circuit consists of an impedance matching network, a rectifying diode and a direct-current filter which are sequentially connected. The system is small in size and simple in structure, and can be used for a wireless sensor network.

Description

technical field [0001] The invention belongs to the technical field of radio frequency electronics, and further relates to a radio frequency energy collection RFID tag system. It can be used for wireless energy transmission and wireless sensor network. Background technique [0002] Radio frequency identification technology RFID is a non-contact automatic identification technology through radio frequency energy. Due to its low production cost and long service life, it is widely used in supply chain, logistics, manufacturing, clothing industry, intelligent medical and other industries. With the rapid development of wireless sensor networks in the 21st century, RFID technology has also been applied in wireless sensor networks. In order to reduce the cost of wireless sensor network nodes, the design of passive RFID tags is introduced into wireless sensor networks, and the wireless sensor nodes of RFID tags are developed. The combination with wireless energy transmission can pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077
CPCG06K19/07775
Inventor 李龙崔欣旺赵琦刘海霞张沛陈佳宁
Owner XIDIAN UNIV
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