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Coil module, antenna device, and electronic device

A coil module, helical coil technology, applied in the direction of the mid-position feed between the antenna ends, the antenna, the resonant antenna, etc., can solve the problem of decreased receiving sensitivity and so on

Inactive Publication Date: 2015-12-30
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the substantial reduction in inductance, the reception sensitivity decreases

Method used

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  • Coil module, antenna device, and electronic device
  • Coil module, antenna device, and electronic device
  • Coil module, antenna device, and electronic device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0032]

[0033] Such as Figure 1A and Figure 1B As shown, the coil module 10 includes a helical coil 2 formed by winding a lead wire 1 in a spiral shape, and a magnetic resin layer 4 a made of a resin containing magnetic particles. The helical coil 2 has lead-out portions 3a, 3b at the ends of the lead wire 1, and by connecting a rectifier circuit or the like to the lead-out portions 3a, 3b, a secondary side circuit of a non-contact charging circuit is formed. Such as Figure 1B As shown, the lead-out portion 3a on the inner diameter side of the helical coil 2 passes through the lower surface side of the wound wire 1, crosses the wire 1, passes through the notch 21 provided in the magnetic resin layer 4a, and is drawn out of the helical coil 2. radial side.

[0034] Such as Figure 2A and Figure 2BAs shown, in the coil module 10a, the helical coil 2 may be mounted so that the lead-out part 3a is embedded in the magnetic resin layer 4a before the magnetic resin layer 4...

no. 2 approach

[0049]

[0050] Such as Figure 4A and Figure 4B As shown, the coil module 20 of the present invention includes a helical coil 2 formed by winding a conductive wire 1 in a spiral shape, and a magnetic resin layer 4 a and a magnetic layer 4 b made of resin containing magnetic particles. The helical coil 2 has lead-out parts 3a, 3b at the end of the lead wire 1, and a rectifier circuit or the like is connected to the lead-out parts 3a, 3b to constitute a secondary side circuit of a non-contact charging circuit. Such as Figure 4B As shown, the radially inner lead-out portion 3a of the helical coil 2 crosses the wound wire 1 and is drawn out to the radially outer side of the helical coil 2 through the notch 21 provided in the magnetic resin layer 4a and the magnetic layer 4b. In FIG. 2, although the notch 21 is formed in the magnetic resin layer 4a and the magnetic layer 4b, similarly to the first embodiment, the lead-out portion 3a may be buried in the magnetic resin layer ...

Embodiment 1

[0086] exist Figure 9A The relative value of the inductance is shown when the magnetic resin layer 4 a having an average magnetic permeability of about 20 blended with spherical amorphous powder having a size ratio (major axis / short axis) of 6 or less is used as the magnetic shielding layer.

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Abstract

Provided is a coil module that can be reduced in size and thickness as a result of the incorporation of a material and structure that resist magnetic saturation. Said coil module is provided with a magnetic-grain-containing magnetic resin layer (4a) and a spiral coil (2). The magnetic resin layer (4a) contains magnetic grains that either are spherical or are spheroidal with an aspect ratio, expressed as the quotient of the major diameter and the minor diameter, of 6 or less.

Description

technical field [0001] The present invention relates to a coil module including a helical coil and a magnetic shielding layer made of a magnetic shielding material, and more particularly to a coil module having a magnetic resin layer containing magnetic particles as a magnetic shielding layer, an antenna device and an electronic device using the coil module . This application claims priority based on Japanese Patent Application No. Japanese Patent Application No. 2013-056045 for which it applied in Japan on March 19, 2013, and is used for this application by referring to this application. Background technique [0002] In recent wireless communication devices, a plurality of RF antennas such as telephone communication antennas, GPS antennas, wireless LAN / BLUETOOTH (registered trademark) antennas, and RFID (Radio Frequency Identification: radio frequency identification) are mounted. In addition to these, with the introduction of non-contact charging, an antenna coil for power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q7/06C01G49/00C04B35/622G06K19/07H01Q9/27
CPCG06K19/07779G06K19/07794H01Q1/2208H01Q7/06H02J50/10H02J50/70H02J50/80G06K19/07773H01Q1/38
Inventor 久村达雄久保佑介良尊弘幸
Owner DEXERIALS CORP