High-frequency antenna multiplexing method for multi-RFID tag identification
A technology of RFID tags and high-frequency antennas, applied in the field of high-frequency antenna multiplexing, can solve the problems of passive tags that are difficult to maintain the normal operation of tags, and achieve the effect of compact size
Active Publication Date: 2021-03-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0007] Disadvantages of the existing technology: Most of the existing technologies use one antenna to match one device. For example, in the traditional RFID system, almost one tag is equipped with one antenna. function), multiple antennas are required
If the distance between the receiving antenna and the transmitting antenna is a little far, it may be difficult for the energy collected by the passive tag to maintain the normal operation of the tag
Method used
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[0025] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.
[0026] The antenna multiplexing technology of the present invention makes an antenna suitable for the limited and narrow space, and all other devices that need to communicate in the space are mounted on the antenna. This antenna multiplexing technology can enable multiple devices to share one antenna, and can provide energy for all devices at the same time through wireless energy harvesting. The devices mounted on the antenna collect enough energy to start working. There are two working modes:
[0027] (1) When the master device identifies the slave device mounted on the antenna through the anti-collision algorithm, the slave device selects a random time, and the slave device is in a sleep state during this time. After the sleep, the slave device ...
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The invention discloses a high-frequency antenna multiplexing method for multi-RFID tag identification. The method is applied to the field of wireless communication, and aims to solve the problems ofenergy transmission and communication in a narrow space. An antenna suitable for the space is manufactured in the limited narrow space, and all other devices needing communication in the space are mounted on the antenna. A plurality of devices use the same antenna to collect electromagnetic wave energy, and the plurality of devices use the same antenna to communicate with other devices. Each device selects an exclusive antenna (a full matching mode that one device is connected to the antenna) or a yielding antenna (the device is short-circuited and does not receive signals and energy of the antenna) according to the received command, only one device exclusive antenna can be selected when the device function is started each time, and all other devices yield the antenna. The device exclusively occupying the antenna can obtain sufficient energy from the antenna.
Description
technical field [0001] The invention belongs to the field of wireless communication, in particular to a high-frequency antenna multiplexing technology. Background technique [0002] With the progress and development of science and technology, wireless communication technology has played a huge role in people's various production activities. Wireless communication can be divided into near-field communication and long-distance communication according to the communication distance. Near-field communication uses coil antenna coupling to transfer energy and data, and long-distance communication uses electromagnetic radiation for energy transfer and information communication. Antenna is an important device for transmitting and receiving electromagnetic waves in wireless communication. It can be said that there is no wireless communication technology without antenna. In order to realize the development of communication systems such as large capacity, multi-function and ultra-wideba...
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IPC IPC(8): H01Q1/22H04B5/00
CPCH01Q1/2208H04B5/77
Inventor 李镇兵李钢吴沛奇胡伟陈德旭文光俊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA