RFID reader

• US 20080315996A1
• Filed: 05/15/2008
• Published: 12/25/2008
• Est. Priority Date: 05/15/2007
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Horst, Dieter, Domokos, John
• Application Number:
  US12/152,576
• Publication Number:
  US 20080315996A1
• Time in Patent Office: Days
• US Class Current: 340/10.1
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems

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.

Claims

1-15. -15. (canceled)

16. A RFID reader, comprising:

a receiver section for receiving an RF signal; and

a transmitter section for transmitting an RF signal, wherein the reader is a multicarrier RFID reader, wherein a transmitted RF signal and a received RF signal comprise at least two frequencies.

17. The reader according to claim 16, wherein the receiver section comprises

an input to receive an R-F signal,

a down converter stage to downconvert the RF signal to a baseband, and

a processor.

18. The reader according to claim 17, wherein the downconverter stage further comprises a splitter to split the received RF signal into its component frequency signals;

and wherein each component signal is downconverted.

19. The reader according to claim 18, wherein a down converter is provided for each of the split RF signals.

20. The reader according to claim 17, further comprising a baseband filter to filter out beat frequencies of the received, downconverted signal.

21. The reader according to claim 16, wherein the transmitter section comprises a baseband signal generator, an upconverter stage and an RF output.

22. The reader according to claim 21, wherein the upconverter stage further comprises a splitter to split a signal from the baseband signal generator into at least two frequencies;

and wherein upconversion of each baseband signal is performed.

23. The reader according to claim 22, wherein an up converter is provided for each of the split baseband signals.

24. The reader according to claim 22, wherein the upconverter stage further comprises a summer to combine the upconverted signals for transmission.

25. The reader according to claim 22, wherein the baseband signal is generated in a baseband digital signal processor.

26. The reader according to claim 16, wherein the reader is a hand portable receiver.

27. The reader according to claim 16, wherein a single antenna is used for transmission and reception of the RF signals.

28. The reader according to claims 16, wherein the reader is a gate reader.

29. The reader according to claim 28, wherein the gate reader comprises multiple antennas.

30. The reader according to claim 16, wherein the reader incorporates frequency hopping functionality.