RFID TAG AND ELECTRONIC DEVICE EQUIPPED WITH RFID TAG

• US 20120223147A1
• Filed: 02/24/2012
• Published: 09/06/2012
• Est. Priority Date: 03/01/2011
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: OHSHIMA, Atsushi
• Granted Patent: US 8,794,534 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• CPC Class Codes: G06K 19/07769 the further communication means being a galvanic interface, e.g. hybrid or mixed smart cards having a contact and a non-contact interface

Abstract

A radio frequency identification (RFID) tag is commonly used in wired communication and wireless communication. Wiring of an antenna for the wireless communication is also used for wiring in the wired communication, and the wiring of the antenna is isolated in the wired communication.

Claims

1. A radio frequency identification (RFID) tag commonly used in wired communication and wireless communication, wherein,

wiring of a wireless antenna for the wireless communication is also used for wiring in the wired communication, and

the wiring of the wireless antenna is isolated in the wired communication.

2. The RFID tag according to claim 1, wherein

a terminal used in the wired communication is provided on the wireless antenna.

3. The RFID tag according to claim 1, wherein

the wireless antenna includes a first antenna for power supply and a second antenna for communication,

first wiring of the first antenna is also used as second wiring in wired power supply, and

third wiring of the second antenna is also used as fourth wiring in the wired communication.

4. The RFID tag according to claim 1, wherein

the wireless antenna is formed by a common antenna for power supply and communication, and

wiring of the common antenna is also used as one of wiring for power supply used in the wired communication and another wiring used in the wired communication.

5. The RFID tag according to claim 1, wherein the wireless antenna for the wireless communication is formed by a loop antenna.

6. The RFID tag according to claim 5, further comprising:

an isolation unit that is provided on the loop antenna and isolates a path of the loop antenna in the wired communication.

7. The RFID tag according to claim 6, wherein

the isolation unit is a high-frequency matching component that shows reactance of about 0 at a high frequency and an increased value thereof at a low frequency.

8. The REID tag according to claim 6, wherein

the isolation unit is a mechanical switch that is turned off when the RFID tag is mounted on a device and is turned on when the RFID tag is unmounted therefrom.

9. The RFID tag according to claim 1, wherein the wireless antenna is formed by a dipole antenna.

10. The RFID tag according to claim 1, wherein

the wireless antenna is formed by a planar patch antenna.

11. The RFID tag according to claim 10, wherein

a patch portion of the planar patch antenna is also used as a wired terminal.

12. An electronic device, comprising:

a radio frequency identification (RFID) tag that is commonly used in wired communication and wireless communication and is mounted on the electronic device, wherein,

wiring of a wireless antenna for the wireless communication is also used in the wired communication for wiring, and

the wiring of the wireless antenna is isolated in the wired communication.