RFID transponder and RFID transponder web

• US 9,858,521 B2
• Filed: 10/14/2014
• Issued: 01/02/2018
• Est. Priority Date: 10/14/2014
• Status: Active Grant

• Current Assignee: Confidex Oy (Beontag)
• Original Assignee: Confidex Oy (Beontag)
• Inventors: Ritamki, Matti, Ahokas, Heikki, Pylvninen, Miika
• Primary Examiner(s): BLOUIN, MARK S
• Application Number:
  US15/518,425
• Publication Number:
  US 20170316299A1
• Time in Patent Office: 1,176 Days
• Field of Search: 340 101
• CPC Class Codes: G06K 1/12 otherwise than by punching
• CPC Class Codes: G06K 19/07718 the record carrier being manufactured in a continuous process, e.g. using endless rolls
• 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: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H04B 5/77 for interrogation

Abstract

An RFID transponder (100), comprising a printable surface (1), an antenna element (2), an IC (3), and a ground plane (4) arranged under the antenna element (2). The ground plane (4) comprises one or more opening(s) (6) through said ground plane (4) for enabling near field communication through the ground plane (4).

Claims

1. An RFID transponder, comprising

a printable surface,

an antenna element,

an IC,

a ground plane arranged under the antenna element,

the ground plane comprising one or more opening(s) through said ground plane for enabling near field communication through the ground plane.

2. The RFID transponder as claimed in claim 1, wherein a spacer layer made of a dielectric material is arranged between the antenna element and the ground plane.

7. The RFID transponder as claimed in claim 1, wherein at least one of said opening(s) is arranged under an impedance matching element arranged in the antenna element.

8. The RFID transponder as claimed in claim 1, wherein at least one of said opening(s) is arranged under a radiating element arranged in the antenna element.

9. The RFID transponder as claimed in claim 1, comprising a secondary antenna, wherein the one or more opening(s) through the ground plane are arranged for enabling near field communication of the secondary antenna through the ground plane.

10. The RFID transponder as claimed in claim 1, comprising a secondary antenna, wherein the one or more opening(s) through the ground plane are arranged for enabling near field communication of the secondary antenna through the ground plane.

3. The RFID transponder as claimed in 1, wherein the opening is a slot or groove.

4. The RFID transponder as claimed in 1, wherein the opening is a slot or groove.

5. The RFID transponder as claimed in 1, wherein the opening has a shape of circle, ellipse or polygon.

6. The RFID transponder as claimed in 1, wherein the opening has a shape of circle, ellipse or polygon.

11. An RFID transponder web, comprising

a support substrate, and

a series of the RFID transponders arranged on said support substrate such that there is a distance (D) between two successive RFID transponders,

the transponder(s) having a transponder thickness (T),

and a bridge arranged between the successive RFID transponders, the bridge having a bridge thickness (t), the transponder thickness (T) and the bridge thickness (t) being equal or at least essentially equal, and wherein

the bridge is excluded from completed RFID transponders separated from the RFID transponder web.

12. The RFID transponder web as claimed in claim 11, wherein the width (w) of the bridge is less than the width (W) of the RFID transponder.

13. The RFID transponder web as claimed in claim 11, wherein the bridge comprises a secondary antenna arranged for near field communication.

14. The RFID transponder web as claimed in claim 11, wherein the bridge comprises a ground plane, and one or more opening(s) through said ground plane for enabling near field communication of the secondary antenna through the ground plane.