Wireless IC device and component for wireless IC device

• US 8,424,762 B2
• Filed: 07/03/2012
• Issued: 04/23/2013
• Est. Priority Date: 07/04/2007
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Kato, Noboru, Ikemoto, Nobuo
• Primary Examiner(s): LEE, SEUNG H
• Application Number:
  US13/540,694
• Publication Number:
  US 20120267438A1
• Time in Patent Office: 294 Days
• Field of Search: 235/383, 235/385, 235/439, 235/492, 235/493
• US Class Current: 235/429
• 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 19/07756 the connection being non-galvanic, e.g. capacitive
• CPC Class Codes: G06K 19/07758 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
• CPC Class Codes: G06K 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2924/19105 in a side-by-side arrangement on a common die mounting substrate
• 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 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 5/22 Capacitive coupling

Abstract

A wireless IC device includes a cutout portion having no aluminum-deposited film that is provided at an end of an article package made of an aluminum-deposited laminated film, and an electromagnetic coupling module is provided at the cutout portion. The electromagnetic coupling module and the aluminum-deposited film of the package define a wireless IC device. A loop electrode, which is a magnetic field transmission auxiliary radiator of the electromagnetic coupling module, is coupled to the aluminum-deposited film of the package. Thus, the article package functions as a radiator of an antenna.

Claims

1. An article comprising:

a conductive member;

a high-frequency device including a wireless IC chip;

a loop electrode connected to the wireless IC chip;

wherein the loop electrode is defined by at least one of a portion of the conductive member of the article or a separate conductive member that is different from the conductive member of the article and coupled to the conductive member of the article; and

the conductive member of the article defines a radiation electrode that radiates an electromagnetic field.

2. The article according to claim 1, wherein

the loop electrode is defined by a cutout portion at an edge of the conductive member of the article;

and

the high-frequency device is arranged at the cutout portion and is coupled to the conductive member of the article at the cutout portion of the conductive member.

3. The article according to claim 1, wherein the loop electrode is provided at a mounting portion of the article at which the high-frequency device is mounted, such that a loop plane of the loop electrode is arranged in a direction of a plane of the radiation electrode.

4. The article according to claim 3, further comprising:

a matching circuit provided between the mounting portion of the article and the loop electrode;

wherein

the matching circuit directly electrically connects the high-frequency device with the loop electrode.

5. The article according to claim 1, further comprising at least one resonant circuit provided in the article.

6. The article according to claim 5, wherein a resonant frequency of the at least one resonant circuit corresponds to a frequency of a signal exchanged by the radiation electrode.

7. The article according to claim 1, further comprising:

a resonant conductor having a resonant frequency that is equal to an operating frequency of the high-frequency device;

wherein

the resonant conductor is coupled to the high-frequency device.

8. The article according to claim 7, wherein the resonant conductor is arranged parallel to an edge portion of the radiation electrode.

9. The article according to claim 7, wherein the resonant conductor has a length that is equal to a side of the radiation electrode that is located adjacent to the resonant conductor.

10. The article according to claim 7, wherein the resonant conductor is arranged such that a center portion of the resonant conductor is located adjacent to a location of the high-frequency device.

11. The article according to claim 7, wherein a plurality of the high-frequency devices are provided, and the resonant conductor is coupled to each of the plurality of high-frequency devices.

12. The article according to claim 7, wherein the resonant conductor is separable from the conductive member of the article that defines the radiation electrode.