WIRELESS IC TAGS, READER/WRITER FOR WIRELESS IC TAGS, AND WIRELESS IC TAG COMMUNICATION SYSTEM EMPLOYING WIRELESS IC TAG AND READER/WRITER FOR WIRELESS IC TAG

• US 20130015960A1
• Filed: 07/23/2010
• Published: 01/17/2013
• Est. Priority Date: 04/13/2010
• Status: Abandoned Application

• Current Assignee: Sumitomo Corporation
• Original Assignee: Sumitomo Corporation
• Inventors: Kaga, Kikuo, Ashizawa, Shigeo
• Application Number:
  US13/637,714
• Publication Number:
  US 20130015960A1
• Time in Patent Office: Days
• US Class Current: 340/10.51
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07767 the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies

Abstract

An apparatus and a wireless IC tag communication system capable of securely writing and reading data to/from a wireless IC tag through relatively long distance communication are provided.

The wireless IC tag communication system comprises a reader/writer for reading and writing data from/to a wireless IC tag via radio communication and a wireless IC tag constituted by mounting a memory section and an antenna section on a substrate, said reader/writer is adapted to output radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for writing and reading data, said second frequency is different from said first frequency, to thereby electrically activate the wireless IC tag with said radio waves at a first frequency and execute data writing and reading with said radio waves at a second frequency.

Claims

1. A wireless IC tag communication system comprising a reader/writer for reading and writing data from/to a wireless IC tag via radio communication and a wireless IC tag in which a memory section and an antenna section are mounted on a substrate, wherein said reader/writer outputs radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for writing and reading data, said second frequency is different from the first frequency, to thereby electrically activate the wireless IC tag with the radio waves at a first frequency and execute data writing and reading with the radio waves at a second frequency.

2. A wireless IC tag communication system according to claim 1, wherein the reader/writer alternately outputs radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for writing and reading data to thereby cause the wireless IC tag to operate and to read and write data.

3. A wireless IC tag communication system according to claim 1, wherein the reader/writer simultaneously outputs radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for writing and reading data to thereby cause the wireless IC tag to operate and to read and write data.

4. A wireless IC tag communication system according to claim 1, wherein the reader/writer and the wireless IC tag carry out communication by means of the electromagnetic induction system.

5. A wireless IC tag communication system according to claim 1, wherein the reader/writer and the wireless IC tag carry out communication by means of the radio wave system.

13. A wireless IC tag communication system according to claim 2, wherein the reader/writer and the wireless IC tag carry out communication by means of the electromagnetic induction system.

14. A wireless IC tag communication system according to claim 3, wherein the reader/writer and the wireless IC tag carry out communication by means of the electromagnetic induction system.

15. A wireless IC tag communication system according to claim 2, wherein the reader/writer and the wireless IC tag carry out communication by means of the radio wave system.

16. A wireless IC tag communication system according to claim 3, wherein the reader/writer and the wireless IC tag carry out communication by means of the radio wave system.

17. A wireless IC tag communication system according to claim 4, wherein the reader/writer and the wireless IC tag carry out communication by means of the radio wave system.

18. A wireless IC tag communication system according to claim 13, wherein the reader/writer and the wireless IC tag carry out communication by means of the radio wave system.

6. A reader/writer for writing and reading data to/from a wireless IC tag via radio communication, characterized in that the reader/writer outputs radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for writing and reading data.

7. The reader/writer according to claim 6, characterized by alternately outputting radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for reading and writing data.

8. The reader/writer according to claim 6, characterized by simultaneously outputting radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for reading and writing data.

9. The reader/writer according to claim 6, wherein the reader/writer includes an electromagnetic induction circuit and outputs radio waves by means of the electromagnetic induction system, which generates alternating magnetic field by applying alternating current to a coil antenna.

10. The reader/writer according to claim 6, wherein the reader/writer includes a reflection circuit and outputs radio waves by means of the radio wave system, which establish communication between a wireless IC tag and a communication tag by using radio waves being reflected to a plate-shaped antenna.

19. The reader/writer according to claim 7, wherein the reader/writer includes an electromagnetic induction circuit and outputs radio waves by means of the electromagnetic induction system, which generates alternating magnetic field by applying alternating current to a coil antenna.

20. The reader/writer according to claim 8, wherein the reader/writer includes an electromagnetic induction circuit and outputs radio waves by means of the electromagnetic induction system, which generates alternating magnetic field by applying alternating current to a coil antenna.

11. A wireless IC tag characterized in that it receives radio waves at a first frequency for electrically activating the wireless IC tag and radio waves at a second frequency for writing and reading data, said second frequency is different from the first frequency and both of said radio waves are output from the reader/writer, and includes either an electromagnetic induction circuit to receive radio waves via a coil antenna or a reflection circuit to receive radio waves via a plate-shaped antenna, or both of an electromagnetic induction circuit to receive radio waves via said coil antenna and a reflection circuit to receive radio waves via said plate-shaped antenna.

12. A wireless IC tag according to claim 11, wherein the memory section consisting of the wireless IC tag is a non-volatile memory utilizing a ferroelectric comprising a power section which receives radio waves from the reader/writer and resonate with said radio waves to generate current.