RFID READER AND RFID SYSTEM

• US 20070176746A1
• Filed: 10/20/2006
• Published: 08/02/2007
• Est. Priority Date: 01/17/2006
• Status: Abandoned Application

• Current Assignee: Integran Technologies Incorporated (Analog Devices, Inc.)
• Original Assignee: Integran Technologies Incorporated (Analog Devices, Inc.)
• Inventors: Kim, Bo-Eun, Kim, Bonkee, Lee, Jeiyoung, Yang, Kyoung On
• Application Number:
  US11/551,658
• Publication Number:
  US 20070176746A1
• Time in Patent Office: Days
• US Class Current: 340/10.100
• 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 7/10069 the collision being resolved in the frequency domain, e.g. by hopping from one frequency to the other frequency hopping or spread spectrum techniques H04B7/00
• CPC Class Codes: H04B 1/403 using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver

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.

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; and

a 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; and

an electronic tag.