Invention Grant
US07834743B2 RFID tag and RFID tag communication distance modification method
有权
RFID标签和RFID标签通信距离修改方法
- Patent Title: RFID tag and RFID tag communication distance modification method
- Patent Title (中): RFID标签和RFID标签通信距离修改方法
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Application No.: US11628751Application Date: 2005-06-10
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Publication No.: US07834743B2Publication Date: 2010-11-16
- Inventor: Minehisa Nagata , Satoshi Tagiri , Izumi Usuki , Shinya Kemi , Hiroaki Niimi , Shunsuke Kuhara
- Applicant: Minehisa Nagata , Satoshi Tagiri , Izumi Usuki , Shinya Kemi , Hiroaki Niimi , Shunsuke Kuhara
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2004-172127 20040610
- International Application: PCT/JP2005/010659 WO 20050610
- International Announcement: WO2005/122418 WO 20051222
- Main IPC: H04L9/32
- IPC: H04L9/32 ; H04M1/66
Abstract:
It is possible to prevent an unauthorized read-out from both active tags and passive tags. Antenna emission is turned on and off by using a switch, or attenuated by using a resistor. A part of the antenna may be chipped. With these configurations, it is possible to lower the emission level of the antenna thus preventing an unauthorized read-out of important information from a remote reader.
Public/Granted literature
- US20070229278A1 Radio Tag and Radio Tag Communication Distance Modification Method Public/Granted day:2007-10-04
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