RFID READER AND RFID SYSTEM

Abstract

Provided are a radio frequency identification (RFID) reader and a RFID system. Particularly, the RFID reader uses a listen before talk (LBT) mode to identify. A reader for RFID comprises a data path block receiving a tag data signal, a search path block receiving a channel search signal, and a path selection block selecting one of the data path block and the search path block.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are comprised to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 illustrates the configuration of a typical RFID system;

FIG. 2 illustrates the configuration of a typical RFID reader;

FIG. 3 illustrates the configuration of a RFID reader according to an embodiment of the present invention; and

FIG. 4 illustrates a graph of simulation results to show a comparison between noise figures of the embodied RFID reader when executing a normal operation and an LBT operation.

Claims

1. A reader for RFID (radio frequency identification), wherein the reader performs an LBT (listen before talk) mode, the reader comprising: a data path block receiving a tag data signal;a search path block receiving a channel search signal; anda path selection block selecting one of the data path block and the search path block.

2. The reader of claim 1, wherein the search path block comprises an amplifier amplifying the channel search signal.

3. The reader of claim 1, wherein the search path block comprises an insulating switch configured to isolate the search path block and the data path block from each other.

4. The reader of claim 1, further comprising a power path block transmitting a power signal.

5. The reader of claim 4, wherein the tag data signal, the channel search signal and the power signal are transmitted and received through a single antenna coupled with the reader.

6. A system for RFID comprising: a RFID reader claimed in claim 1; andan electronic tag.