RFID tag and RFID tagged article

Patent metadata

Field	Value
Publication number	US-11138491-B2
Application number	US-201916455859-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jun 25, 2018
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

An RFID tag including an RFIC element, a first inductor element that includes a first insulating substrate having a mounting surface on which the RFIC element is mounted, and first coil-shaped antenna internally embedded in first insulating substrate with a winding axis perpendicular to the mounting surface, and second inductor element that includes second insulating substrate mounted on the mounting surface, and second coil-shaped antenna internally embedded in second insulating substrate, electrically connected to first coil-shaped antenna, and with a winding axis parallel to the mounting surface. The first insulating substrate includes a laminate with dielectric layers or magnetic layers laminated, and the first coil-shaped antenna includes a laminate coil-shaped antenna in which conductor patterns are each formed on a corresponding one of the layers of the laminate, such that they are connected to each other through interlayer connection conductor.

First claim

The invention claimed is:

1. An RFID tag comprising:
an RFIC element;
a first inductor element that includes a first insulating substrate having a mounting surface coupled to the RFIC element, and a first coil-shaped antenna internally embedded in the first insulating substrate and having a winding axis extending in a direction perpendicular or substantially perpendicular to the mounting surface; and
a second inductor element that includes a second insulating substrate coupled to the mounting surface, and a second coil-shaped antenna internally embedded in the second insulating substrate, electrically connected to the first coil-shaped antenna, and having a winding axis extending in a direction parallel or substantially parallel to the mounting surface,
wherein the first insulating substrate includes a laminate having a plurality of dielectric layers or a plurality of magnetic layers, and the first coil-shaped antenna includes a laminate coil-shaped antenna with a plurality of conductor patterns disposed on a corresponding one of the plurality of dialectic or magnetic layers of the laminate, respectively, with the plurality of conductor patterns connected to each other through respective interlayer connection conductors, and
wherein the RFIC element and the second inductor element are at least partially disposed within an opening area of the first coil-shaped antenna when viewed in a direction of the winding axis of the first coil-shaped antenna.

2. The RFID tag according to claim 1 , wherein the RFIC element and the second inductor element are each disposed on the mounting surface and spaced apart from each other.

3. The RFID tag according to claim 1 , wherein the second inductor element comprises a plurality of second inductor elements disposed on the mounting surface, with each of the plurality of second inductor elements including a respective second coil-shaped antenna with a respective winding axis that extends in the direction parallel or substantially parallel to the mounting surface.

4. The RFID tag according to claim 3 , wherein respective winding axes of the plurality of second inductor elements intersect each other.

5. The RFID tag according to claim 4 , wherein each of the plurality of second inductor elements are connected in series with the RFIC element.

6. The RFID tag according to claim 4 , wherein each of the plurality of second inductor elements are connected in parallel with the RFIC element.

7. The RFID tag according to claim 1 , wherein the second inductor element is disposed farther away from the mounting surface than the RFIC element.

8. The RFID tag according to claim 1 , wherein the first insulating substrate has a resin member disposed on the mounting surface to seal the RFIC element and the second inductor element.

9. The RFID tag according to claim 1 , wherein each of the first coil-shaped antenna and the second coil-shaped antenna is configured to wirelessly communicate data in a UHF band.

10. An RFID tag comprising:
an RFIC element;
a first inductor element that includes a first insulating substrate having a surface coupled to the RFIC element, and a first coil-shaped antenna embedded in the first insulating substrate and having a winding axis extending perpendicularly to the mounting surface; and
at least one second inductor element that includes a second insulating substrate coupled to the mounting surface, and a second coil-shaped antenna embedded in the second insulating substrate and having a winding axis extending in parallel to the mounting surface,
wherein the first coil-shaped antenna is electrically connected to the second coil-shaped antenna,
wherein the first insulating substrate includes a laminate having a plurality of dielectric layers or a plurality of magnetic layers, and the first coil-shaped antenna includes a laminate coil-shaped antenna with a plurality of conductor patterns disposed on a corresponding one of the plurality of dialectic or magnetic layers of the laminate, respectively, with the plurality of conductor patterns connected to each other through respective interlayer connection conductors, and
wherein the RFIC element and the second inductor element are at least partially disposed within an opening area of the first coil-shaped antenna when viewed in a direction of the winding axis of the first coil-shaped antenna.

11. The RFID tag according to claim 10 , wherein the RFIC element and the second inductor element are each disposed on the mounting surface and spaced apart from each other.

12. The RFID tag according to claim 10 , wherein the second inductor element comprises a plurality of second inductor elements disposed on the mounting surface, with each of the plurality of second inductor elements including a respective second coil-shaped antenna with a respective winding axis that extends in the direction parallel or substantially parallel to the mounting surface.

13. The RFID tag according to claim 12 , wherein respective winding axes of the plurality of second inductor elements intersect each other.

14. An RFID tagged article comprising:
a metal surface; and
an RFID tag attached to the metal surface and:
an RFIC element;
a first inductor element that includes a first insulating substrate having a mounting surface coupled to the RFIC element, and a first coil-shaped antenna internally embedded in the first insulating substrate and having a winding axis extending in a direction perpendicular or substantially perpendicular to the mounting surface; and
a second inductor element that includes a second insulating substrate disposed on the mounting surface, and a second coil-shaped antenna internally embedded in the second insulating substrate, electrically connected to the first coil-shaped antenna, and having a winding axis parallel or substantially parallel to the mounting surface,
wherein the second inductor element is coupled between first inductor element and the metal surface,
wherein the first insulating substrate includes a laminate having a plurality of dielectric layers or a plurality of magnetic layers, and the first coil-shaped antenna includes a laminate coil-shaped antenna with a plurality of conductor patterns disposed on a corresponding one of the plurality of dialectic or magnetic layers of the laminate, respectively, with the plurality of conductor patterns connected to each other through respective interlayer connection conductors, and
wherein the RFIC element and the second inductor element are at least partially disposed within an opening area of the first coil-shaped antenna when viewed in a direction of the winding axis of the first coil-shaped antenna.

15. The RFID tagged article according to claim 14 , wherein the second inductor element comprises a plurality of second inductor elements disposed on the mounting surface, with each of the plurality of second inductor elements including a respective second coil-shaped antenna with a respective winding axis that extends in the direction parallel or substantially parallel to the mounting surface.

16. The RFID tagged article according to claim 15 , wherein respective winding axes of the plurality of second inductor elements intersect each other.

Assignees

• Murata Manufacturing Co

Inventors

• Ueki Noriyuki

Classifications

• H01Q1/2225

  used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal · CPC title

• G06K19/07792 Primary

  the antenna adapted for extending in three dimensions · CPC title

• H01Q7/00

  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 title

• G06K19/07779 Primary

  the inductive antenna being a coil · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title