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
CN101236597AInactive Publication Date: 2008-08-06BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2008-08-06
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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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