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Radio IC device and radio IC device part

A wireless and device technology, applied in the field of parts, can solve problems such as changes in antenna resonant frequency characteristics, difficulty in installing tiny wireless IC chips 310, etc., and achieve the effect of improving antenna gain and easy processing

Inactive Publication Date: 2009-01-21
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is extremely difficult to mount the tiny wireless IC chip 310 on the large-area films 300 and 320, and if a positional deviation occurs during mounting, the resonant frequency characteristics of the antenna will change.

Method used

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  • Radio IC device and radio IC device part
  • Radio IC device and radio IC device part
  • Radio IC device and radio IC device part

Examples

Experimental program
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Effect test

no. 2 Embodiment

[0121] (Refer to the second embodiment Figure 8 )

[0122] As the wireless IC device 1b of the second embodiment, such as Figure 8 Shown is a device that makes the radiation plate 20 bifurcate by 90°. That is to say, in the x-y plane, the radiation plate 20 is constituted by the radiation part 20a extending in the x-axis direction and the radiation part 20b extending in the y-axis direction, and the extension line of the radiation part 20a is used as the power supply part 20d, and in The power supply circuit board 10 on which the wireless IC chip 5 is mounted is bonded to the power supply portion 20d.

[0123] In addition, the internal structure of the power supply circuit board 10 is the same as that of the first embodiment, and the effect of the second embodiment is the same as that of the first embodiment. Furthermore, since the radiation parts 20a and 20b extend in the x-axis direction and the y-axis direction, circularly polarized waves can be received, thereby impro...

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PUM

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Abstract

It is possible to provide a radio IC device and a radio IC device part having stable frequency characteristic. The radio IC device includes: a radio IC chip (5); a feed circuit substrate (10) having the radio IC chip (5) mounted thereon and a feed circuit (16) containing a resonance circuit having a predetermined resonance frequency; and an emission plate (20) bonded to the lower surface of the feed circuit substrate (10) for emitting the transmission signal supplied from the feed circuit (16) and supplying the reception signal to the feed circuit (16). The resonance circuit is formed by an LC resonance circuit having an inductance element (L) and capacitance elements (C1, C2). The feed circuit substrate (10) is a multi-layer or single-layer rigid substrate and connected to the radio IC chip (5) and the emission plate (20) by DC coupling, magnetic coupling, or capacity coupling.

Description

[0001] technology area [0002] The present invention relates to a wireless IC device, in particular to a wireless IC device used in an RFID (Radio Frequency Identification, radio frequency identification) system and parts used in the wireless IC device. Background technique [0003] In recent years, as a management system for articles, a reader-writer that generates an induced electromagnetic field and an IC tag (hereinafter referred to as a wireless IC device) attached to an article and storing specified information have been researched to communicate in a non-contact manner, thereby RFID system for information transfer. As a wireless IC device used in an RFID system, for example, devices described in Patent Documents 1 and 2 are known. [0004] That is, if Figure 59 As shown, an antenna pattern 301 is provided on a plastic film 300, and a wireless IC chip 310 is mounted on one end of the antenna pattern 301, such as Figure 60 As shown, a device is provided in which an a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50G06K19/07G06K19/077H01Q1/38H01Q1/46H01Q9/16H04B5/02H04B5/48
CPCH01Q1/2208H01Q1/2225H01Q1/38H01Q9/16G06K19/07749G06K19/07756H04B5/22H04B5/77H01L2224/16225
Inventor 道海雄也加藤登石野聪
Owner MURATA MFG CO LTD
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