TRANSPONDER NETWORKS AND TRANSPONDER SYSTEMS EMPLOYING A TOUCH PROBE READER DEVICE

• US 20080169928A1
• Filed: 01/09/2008
• Published: 07/17/2008
• Est. Priority Date: 01/11/2007
• Status: Active Grant

• Current Assignee: University of Pittsburgh of The Commonwealth System of Higher Education
• Original Assignee: University of Pittsburgh of The Commonwealth System of Higher Education
• Inventors: Hawrylak, Peter J., Mickle, Marlin H.
• Granted Patent: US 7,825,807 B2
• Time in Patent Office: Days
• US Class Current: 340/572.4
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/07752 using an interposer

Abstract

Transponder networks and transponder systems are provided which help to overcome the issues presented to transponders systems by FCC power limitations. One embodiment provides a transponder network that includes a plurality of RFID straps in order to increase the amount of memory that is practically available in the network. Other embodiments provide transponder systems employing a touch probe RFID reader device that enable information to be communicated to and from a transponder or a transponder network by establishing physical contact with the reader device rather than through an air interface.

Claims

1. A transponder network, comprising:

a plurality of RFID straps, each of said RFID straps including a substrate, first and second leads provided on said substrate, and a chip having a memory and one or more contacts provided on said substrate, each of said first and second leads being electrically coupled to a respective one or more of said one or more contacts, wherein the first leads of each of said RFID straps are electrically coupled to one another and the second leads of each of said RFID straps are electrically coupled to one another, and wherein each of said RFID straps is provided with a unique identifier to enable the memory thereof to be selectively accessed.

2. The transponder network according to claim 1, wherein the first leads of each of said RFID straps are electrically coupled to one another by a first conductor, wherein the second leads of each of said RFID straps are electrically coupled to one another, and wherein said first conductor and said second conductor are operatively coupled to an antenna for receiving and transmitting RF signals.

3. The transponder network according to claim 1, wherein each of said RFID straps includes an internal power source for providing power to the RFID strap.

4. The transponder network according to claim 1, wherein each of said RFID straps is passive and is powered by one or more RF signals received by the transponder network.

5. The transponder network according to claim 4, wherein the chip of each of said RFID straps includes energy harvesting circuitry, wherein at least a portion of said one or more RF signals is received in said energy harvesting circuitry, wherein said energy harvesting circuitry converts the at least a portion of said one or more RF signals into DC energy, and wherein said DC energy provides power to chip.

6. The transponder network according to claim 5, wherein the chip of each of said RFID straps further includes on-board electronic circuitry and RF transmitter circuitry, and wherein said DC energy provides power to on-board electronic circuitry and said RF transmitter circuitry.

7. The apparatus according to claim 5, wherein the energy harvesting circuitry of each chip includes a matching network having an impedance chosen in manner so as to maximize a voltage level of the DC energy.

8. The apparatus according to claim 5, wherein the energy harvesting circuitry of each chip includes a matching network having an impedance chosen in manner so as to maximize the power delivered to the chip.

9. The apparatus according to claim 5, wherein the energy harvesting circuitry of each chip includes a matching network having an impedance chosen in manner so as to maximize a physical characteristic of the energy delivered to the chip.

10. A transponder system, comprising:

at least one transponder, said at least one transponder including a substrate, one or more leads provided on said substrate, and a chip having one or more contacts provided on said substrate, each of said one or more leads being electrically coupled to a respective one or more of said one or more contacts, said at least one transponder having an antenna having a first terminal and a second terminal wherein said first terminal is connected to one of said one or more leads; and

a reader device, said reader device including a control system, a radio module and a touch probe having a probe contact operatively coupled to said radio module, said radio module being adapted to generate one or more RF signals under the control of said control system, said probe contact being operatively coupled to said radio module for receiving said one or more RF signals and being structured to be temporarily brought into electrical contact with at least one of said antenna and said one of said one or more leads of said at least one transponder;

wherein when said probe contact receives said one or more RF signals and is brought into electrical contact with at least one of said antenna and said one of said one or more leads of said at least one transponder, said one or more RF signals are communicated to said at least one transponder.

11. The transponder system according to claim 10, wherein said one or more leads comprise a first lead and a second lead, wherein said first terminal is connected to said first lead.

12. The transponder system according to claim 11, wherein said second terminal is connected to said second lead, wherein said probe contact is structured to be temporarily brought into electrical contact with at least one of said antenna, said first lead and said second lead, and wherein when said probe contact receives said one or more RF signals and is brought into electrical contact with at least one of said antenna, said first lead and said second lead, said one or more RF signals is communicated to said at least one transponder.

13. The transponder system according to claim 10, wherein touch probe is a mono-probe and said probe contact is the only contact of said touch probe.

14. A method of communicating with a transponder apparatus, said transponder apparatus including a substrate, one or more leads provided on said substrate, a chip having one or more contacts provided on said substrate, each of said one or more leads being electrically coupled to a respective one or more of said one or more contacts, and an antenna having a first terminal and a second terminal wherein said first terminal is connected to one of said one or more leads, the method comprising:

providing a reader device having a touch probe having a single probe contact;

generating one or more RF signals in said reader device and providing said one or more RF signals to said single probe contact; and

bringing at least one of said antenna and said one of said one or more leads of said transponder apparatus into electrical contact with said single probe contact to allow said one or more RF signals to be communicated to said transponder apparatus or to allow one or more transponder signals to be communicated from said transponder apparatus to said reader device.

15. The method according to claim 14, wherein said one or more leads comprise a first lead and a second lead, wherein said first terminal is connected to said first lead.

16. The method according to claim 15, wherein said second terminal is connected to said second lead, wherein said bringing comprises bringing at least one of said antenna, said first lead and said second lead into electrical contact with said single probe contact to allow said one or more RF signals to be communicated to said transponder apparatus or to allow one or more transponder signals to be communicated from said transponder apparatus to said reader device.

17. An RF reader device, comprising:

a control system;

a radio module adapted to generate one or more RF signals under the control of said control system; and

a touch probe having a single probe contact operatively coupled to said radio module, said single probe contact being structured to receive said one or more RF signals;

wherein said single probe contact is adapted to be temporarily brought into electrical contact with at least one of an antenna and one of one or more leads of a transponder apparatus to allow at least said one or more RF signals to be communicated to said transponder apparatus or to allow one or more transponder signals to be communicated from said transponder apparatus to said RF reader device.

18. A transponder system, comprising:

at least one transponder network, said at least one transponder network including a plurality of RFID straps, each of said RFID straps including a substrate, first and second leads provided on said substrate, and a chip having a memory and one or more contacts provided on said substrate, each of said first and second leads being electrically coupled to a respective one or more of said one or more contacts, wherein the first leads of each of said RFID straps are electrically coupled to one another by a first conductor and the second leads of each of said RFID straps are electrically coupled to one another by a second conductor; and

a reader device, said reader device including a control system, a radio module and a touch probe having one or more probe contacts operatively coupled to said radio module, said radio module being adapted to generate one or more RF signals under the control of said control system, said one or more probe contacts being operatively coupled to said radio module for receiving said one or more RF signals and being structured to be temporarily brought into electrical contact with at least a portion of said at least one transponder network;

wherein when said one or more probe contacts receive said one or more RF signals and are brought into electrical contact with said at least a portion of said at least one transponder network, said one or more RF signals are communicated to each of said chips of said at least one transponder network.

19. The transponder system according to claim 18, wherein said one or more probe contacts are structured to be temporarily brought into electrical contact with said first conductor and said second conductor, and wherein when said one or more probe contacts receive said one or more RF signals and are brought into electrical contact with said first conductor and said second conductor, said one or more RF signals are communicated to each of said chips of said at least one transponder network.

20. The transponder system according to claim 18, wherein said at least one transponder network has an antenna having a first terminal and a second terminal wherein said first terminal is connected to said first conductor, wherein said one or more probe contacts comprise a single probe contact structured to be temporarily brought into electrical contact with at least one of said antenna and said first conductor, and wherein when said single probe contact receives said one or more RF signals and is brought into electrical contact with at least one of said antenna and said first conductor, said one or more RF signals are communicated to each of said chips of said at least one transponder network.

21. The transponder system according to claim 20, wherein said second terminal is connected to said second conductor, wherein said single probe contact is structured to be temporarily brought into electrical contact with at least one of said antenna, said first conductor and said second conductor, and wherein when said single probe contact receives said one or more RF signals and is brought into electrical contact with at least one of said antenna, said first conductor and said second conductor, said one or more RF signals are communicated to each of said chips of said at least one transponder network.

22. The transponder system according to claim 18, wherein each of said RFID straps is provided with a unique identifier to enable the memory thereof to be selectively accessed.

23. A method of communicating with a transponder network, said transponder network including a plurality of RFID straps, each of said RFID straps including a substrate, first and second leads provided on said substrate, and a chip having a memory and one or more contacts provided on said substrate, each of said first and second leads being electrically coupled to a respective one or more of said one or more contacts, wherein the first leads of each of said RFID straps are electrically coupled to one another by a first conductor and the second leads of each of said RFID straps are electrically coupled to one another by a second conductor, the method comprising:

providing a reader device having a touch probe having a one or more probe contacts;

generating one or more RF signals in said reader device and providing said one or more RF signals to said one or more probe contacts; and

bringing said one or more probe contacts into electrical contact with at least a portion of said transponder network to allow said one or more RF signals to be communicated to each of said chips of said transponder network or to allow one or more transponder signals to be communicated from said transponder network to said reader device.

24. The method according to claim 23, wherein said transponder network has an antenna having a first terminal and a second terminal wherein said first terminal is connected to said first conductor, wherein said one or more probe contacts comprise a single probe contact structured to be temporarily brought into electrical contact with at least one of said antenna and said first conductor, and wherein said bringing said one or more probe contacts into electrical contact with at least a portion of said transponder network comprises bringing said one or more probe contacts into electrical contact with at least one of said antenna and said first conductor.

25. The method according to claim 24, wherein said second terminal is connected to said second conductor, wherein said bringing said one or more probe contacts into electrical contact with at least a portion of said transponder network comprises bringing said one or more probe contacts into electrical contact with at least one of said antenna, said first conductor and said second conductor.

26. The method according to claim 23, wherein each of said RFID straps is provided with a unique identifier to enable the memory thereof to be selectively accessed during said bringing step.