Electromagnetic-coupling-module-attached article

• US 9,165,239 B2
• Filed: 01/31/2013
• Issued: 10/20/2015
• Est. Priority Date: 04/26/2006
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Kato, Noboru, Kimura, Ikuhei, Iwasaki, Kimikazu, Ishino, Satoshi
• Primary Examiner(s): Lim, Steven
• Assistant Examiner(s): Fan, Hongmin
• Application Number:
  US13/754,972
• Publication Number:
  US 20130134228A1
• Time in Patent Office: 992 Days
• Field of Search: 340/572.8, 340/572.7, 340/572.1, 343/860, 343/872, 343/898, 235/487, 235/449, 235/492
• US Class Current: 1/1
• 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 19/07771 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: G06K 19/07773 Antenna details antennas for wireless devices, e.g. RFID tags, in general H01Q1/22
• CPC Class Codes: H01L 2224/16227 the bump connector connecting to a bond pad of the item
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

An electromagnetic-coupling module including a radio IC chip and a feeder circuit board on which the radio IC chip is mounted and a feeder circuit including a resonant circuit having a predetermined resonant frequency is attached to an article. The article has a radiation element that radiates a transmission signal supplied from the feeder circuit of the electromagnetic-coupling module via electromagnetic coupling and that supplies a received reception signal to the feeder circuit via the electromagnetic coupling.

Claims

1. An article comprising:

a metal housing portion including at least one main surface; and

a power supply circuit including a resonant circuit that includes a coil-shaped electrode connected to a radio IC chip, the resonant circuit having a resonant frequency;

wherein

the coil-shaped electrode of the power supply circuit is disposed adjacent to the at least one main surface of the metal housing portion such that a portion of the coil-shaped electrode overlaps the at least one main surface of the metal housing portion and another portion of the coil-shaped electrode does not overlap the at least one main surface of the metal housing portion when viewed in a direction perpendicular to the at least one main surface of the metal housing portion;

the coil-shaped electrode of the power supply circuit is magnetically coupled to the at least one main surface of the metal housing portion, and the metal housing portion is utilized as a radiation element;

the metal housing portion is configured to perform at least one of radiating a transmission signal supplied from the power supply circuit, and receiving a reception signal and supplying the reception signal to the power supply circuit;

the transmission signal and/or the reception signal has a frequency substantially corresponding to the resonant frequency of the resonant circuit; and

the frequency of the transmission signal and/or the reception signal is not substantially dependent upon an electrical length of the radiation element.

2. The article according to claim 1, wherein metal housing portion is a housing of a mobile device.

3. The article according to claim 1, wherein the coil-shaped electrode is provided adjacent to an edge portion of the metal housing portion.

4. The article according to claim 3, wherein a winding axis of the coil-shaped electrode is substantially perpendicular to the metal housing portion.

5. The article according to claim 4, wherein the metal housing portion includes an opening, and the coil-shaped electrode is magnetically coupled to the opening.