NEAR FIELD COUPLING DEVICES AND ASSOCIATED SYSTEMS AND METHODS

• US 20140378050A1
• Filed: 06/26/2014
• Published: 12/25/2014
• Est. Priority Date: 05/11/2009
• Status: Active Grant

• Current Assignee: Zebra Technologies Corporation
• Original Assignee: ZIH Corp. (Zebra Technologies Corporation)
• Inventors: Tsirline, Boris Y., Tian, Mao, Torchalski, Karl
• Granted Patent: US 9,660,701 B2
• Time in Patent Office: Days
• US Class Current: 455/41.1
• CPC Class Codes: B41J 3/407 for marking on special material
• CPC Class Codes: G06K 17/0009 with sequential access selection of a record carrier from the card-file, e.g. relative movement between selecting device and card-file
• CPC Class Codes: G06K 17/0025 the arrangement consisting of a wireless interrogation device in combination with a device for optically marking the record carrier
• CPC Class Codes: G06K 7/10297 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00
• CPC Class Codes: H01Q 3/24 varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• CPC Class Codes: H04B 5/45 Transponders
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04B 5/77 for interrogation

Abstract

A near-field coupling device that may facilitate communications with a transponder is provided. The near-field coupling device may include a ground plane, a dielectric substrate, one or more conductive strips and a terminating load. The conductive strips together with the ground planes form coupling elements. The near-field coupling device further includes one or more switching elements for selectively connecting and disconnecting the coupling elements with a transceiver. The connected coupling elements define a total characteristic impedance. Using the switching element, the ratio between the total characteristic impedance of the connected coupling elements and the terminating load may be changed in order to adjust the distribution of an electromagnetic field along the coupling elements according to the type and position of the transponder to be processed.

Claims

1-20. -20. (canceled)

21. A radio frequency (RF) system, comprising:

a near field coupler configured to transmit a near field effect at a transponder operating region to communicate with a targeted transponder of a carrier substrate when the targeted transponder is moved to the transponder operating region; and

a media conveyance configured to move the carrier substrate through the transponder operating region.

22. The RFID system of claim 21, wherein the near field coupler is configured to transmit the near field effect at the transponder operating region without communicating with a second transponder of the carrier substrate outside of the transponder operating region.

23. The RFID system of claim 22, wherein the second transponder is located adjacent to the targeted transponder on the carrier substrate.

24. The RFID system of claim 22, wherein the RFID system does not include an RF shielding to block transmission of the near field effect outside of the transponder operating region.

27. The RFID system of claim 21, further comprising a controller configured to:

determine that the targeted transponder is located at a field strength gap of the near field effect; and

in response to determining that the targeted transponder is located at the field strength gap of the near field effect within the transponder operating region, control the media conveyance to move the targeted transponder to a second location within the transponder operating region.

28. The RFID system of claim 21 further comprising:

a transceiver communicably connected with the near field coupler; and

a controller configured to energize the transceiver to a predetermined power level to transmit the near field effect at the transponder operating region without communicating with a second transponder of the carrier substrate outside of the transponder operating region.

29. The RFID system of claim 28, wherein the controller is further configured to energize the transceiver to a first power level for writing data to the targeted transponder and to a second power level for reading data from the targeted transponder when the targeted transponder is moved to the transponder operating region.

30. A method, comprising:

moving a carrier substrate through a transponder operating region; and

transmitting a near field effect at the transponder operating region to communicate with a targeted transponder of the carrier substrate when the targeted transponder is moved to the transponder operating region.

31. The method of claim 30, wherein transmitting the near field effect includes transmitting the near field effect at the transponder operating region without communicating with a second transponder of the carrier substrate outside of the transponder operating region.

32. The method of claim 31, wherein the second transponder is located adjacent to the targeted transponder on the carrier substrate.

33. The method of claim 31, wherein transmitting the near field effect at the transponder operating region without communicating with a second transponder of the carrier substrate outside of the transponder operating region includes transmitting the near field effect without an RF shielding to block transmission of the near field effect outside of the transponder operating.

34. The method of claim 30 further comprising generating an ultra-high frequency signal and wherein transmitting the near field effect includes transmitting the ultra-high frequency signal via the near field effect.

35. The method of claim 34, wherein the ultra-high frequency signal includes a range of frequencies between about 902 MHz and 928 MHz.

36. The method of claim 34 further comprising:

determining that the targeted transponder is located at a field strength gap of the near field effect; and

in response to determining that the targeted transponder is located at the field strength gap of the near field effect within the transponder operating region, moving the targeted transponder to a second location within the transponder operating region.

37. The method of claim 36 further comprising energizing the transceiver to a first power level for writing data to the targeted transponder and to a second power level for reading data from the targeted transponder when the targeted transponder is moved to the transponder operating region

38. The method of claim 30 further comprising energizing a transceiver to a predetermined power level to transmit the near field effect at the transponder operating region without communicating with a second transponder of the carrier substrate outside of the transponder operating region.

39. An RF system, comprising:

a near field coupler configured to transmit a near field effect defining a transponder operating region;

a media conveyance mechanically secured with the near field coupler and configured to move a plurality of transponders through the transponder operating region such that a non-targeted transponder is outside of transponder operating region when a targeted transponder is moved to the transponder operating region.

40. The RF system of claim 39 further comprising a transceiver configured to generate an ultra-high frequency signal and wherein the near field coupler is configured to transmit the ultra-high frequency signal via the near field effect at the transponder operating region.