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RFID antennae polling switching device

A switching device and antenna technology, which is applied in the direction of instruments, induction record carriers, computer components, etc., can solve the problems of reducing the effective power of the antenna, increasing the complexity of the control processing module, and shortening the antenna reading distance, so as to reduce the deployment cost, The effect of increasing the number of external antennas and expanding the reading and writing range

Inactive Publication Date: 2008-08-06
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solving this problem will inevitably increase the complexity of the control processing module
Due to the limitation of the transmission power of the reader in the national standard, driving multiple antennas to work by connecting multiple RF ports in parallel will reduce the effective power of each antenna and shorten the antenna reading distance

Method used

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  • RFID antennae polling switching device

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be pointed out that the described embodiments are only for the purpose of illustration and not limitation of the present invention.

[0018] Fig. 1 is the structural representation of a high-frequency (HF) RFID antenna polling switching device embodiment realized on the basis of the principle of the present invention, by reader interface 1, polling configuration module 2, switch drive module 3, power supply module 4 and the antenna end interface 5. The polling configuration module 2 is further divided into a timing sub-module 21, a counting sub-module 22 and a selection sub-module 23, and the switch driving module 3 is further divided into a conversion sub-module 31, an impedance matching sub-module 32, a driving sub-module 33 and a switch sub-module 34. The timing sub-module 21 is further divided into an oscillator 211 and an adjustable resistor 212 .

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Abstract

The invention provides an RFID antenna polling switch device which ensures that a plurality of antennas simultaneously connect to a radio-frequency port of a reader-writer and realize the automatic polling of an antenna array in order to realize time-sharing drive of each antenna to read electronic tags in a coverage area. The invention realizes that one antenna polling switch device or a plurality of antenna polling switch devices are connected in series between the reader-writer and the antennas which are separate from each other; a periodic pulse signal is generated through a timing circuit of the device; a periodic communication and disconnection of at least one mechanical switch are driven so that the radio-frequency port of the reader-writer and a plurality of reader-writer antenna can be communicated in a cycle and time-sharing operation is carried out by each antenna; the invention can solve the problem of collision produced in controlling a processing module and can ensure that the effective power of the antenna is not reduced, thereby achieving a larger reading range and a better reading effect. The RFID antenna polling switch device has simple structure, reliable performance and low cost and can be applicable for the management of warehouses, libraries, etc, in particular for making a periodic inventory of goods or books in different positions of a goods shelf or a bookshelf.

Description

technical field [0001] The invention relates to a multi-antenna multiplexing technology of a radio frequency identification reader-writer, in particular to a multi-band RFID antenna polling switching device which is separated from the reader-writer and the antenna. Background technique [0002] Radio Frequency Identification (RFID) technology is an automatic identification technology based on the principle of radio frequency identification. Usually the RFID system consists of three parts: electronic tags, readers and middleware. As the main channel between the back-end middleware and application system and the front-end electronic tag, the reader plays a pivotal role. Generally, the reader can be divided into three modules: antenna module, radio frequency channel module, and control processing module. The radio frequency channel module and the control processing module are directly integrated in the reader. Some types of readers are integrated with antennas, and one reade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
Inventor 李秀萍刘禹
Owner BEIJING UNIV OF POSTS & TELECOMM
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