RFID reader

a reader and reader technology, applied in the field of rfid readers, can solve the problem of relatively short illumination time and achieve the effect of maximising the read probability
US20080315996A1Inactive Publication Date: 2008-12-25SIEMENS AG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SIEMENS AG
Publication Date
2008-12-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

An RFID reader comprises a receiver section for receiving an RF signal and a transmitter section for transmitting an RF signal. The reader is a multicarrier RFID reader and both the transmitted RF signal and the received RF signal comprise at least two frequencies.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority of United Kingdom Patent Office application No. 0709313.1 GB filed May 15, 2007 and of United Kingdom Patent Office application No. 0802055.4 GB filed Feb. 05, 2008, which are incorporated by reference herein in their entirety.FIELD OF INVENTION

[0002] The mass application of passive ultra high frequency (UHF) radio frequency identification (RFID) systems is becoming widespread in the retail industry, logistics and commerce. In most applications, it is very important that all tags are interrogated successfully during an inventory round, and no tags are missed. Despite efforts in improving the performance of the current RFID systems, 100% success rate has not yet been reached in some applications.BACKGROUND OF INVENTION

[0003] In passive RFID systems the tags receive their power from the RF field transmitted by the reader. The efficiency of the power transfer from the reader to the tags is essential for reliabl...

Claims

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