Title:
多重周波数RFID装置およびRFIDタグ読み取り方法
Document Type and Number:
Japanese Patent JP2008515102
Kind Code:
A
Abstract:
A portable/handheld device is provided having a processing module configured to selectively operate a reading mode selected from a far-field mode and a near-field mode, and a directional antenna array coupled to the processing module. The directional antenna array includes a first antenna element configured to radiate electromagnetic (EM) radiation in a far-field, and a second antenna element coupled to the first antenna element. The second antenna element is configured to radiate EM radiation in a near-field. The second antenna element includes an antenna transducer configured to selectively cancel far-field EM radiation from the first antenna element. A method of reading inductively coupled radio frequency identification (RFID) tags is also provided having the steps of scanning at least one frequency band to detect a RFID tag, and selectively radiating one of a near-field electromagnetic (EM) field and a far-field EM field based on the detected RFID tag.
Inventors:
Knador, Richard Tea. Junior
Charliesh, Hull
Duron, mark william
Bridgelar, Raj
Charliesh, Hull
Duron, mark william
Bridgelar, Raj
Application Number:
JP2007534684A
Publication Date:
May 08, 2008
Filing Date:
September 22, 2005
Export Citation:
Assignee:
Symbol Technologies, Inc.
International Classes:
G06K19/07; H01Q5/15; G06K17/00; G06K19/077
Domestic Patent References:
| JP2001291079A | 2001-10-19 | |||
| JPH07230560A | 1995-08-29 | |||
| JP2002015288A | 2002-01-18 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita