Radio IC device

A wireless and device technology, applied in the field of power supply circuits, can solve the problems of antenna resonant frequency characteristics change, difficulty in installing tiny wireless IC chip 310, etc., and achieve the effect of improving antenna gain and easy processing

Inactive Publication Date: 2017-04-26
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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Experimental program
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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 xy 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, Then, 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 improvi...

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PUM

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Abstract

A wireless IC device and a component for a wireless IC device having a stable frequency characteristic are provided. The wireless IC device includes a wireless IC chip (5), a power feeding circuit (16), where the power feeding circuit (16) includes a resonance circuit having a predetermined resonance frequency, and a radiating plate (20) bonded to a lower surface of the power feeding circuit board (10). The radiating plate (20) radiates a transmission signal supplied from the power feeding circuit (16). The radiating plate (20) further receives and propagates a reception signal to the power feeding circuit (16). The power feeding circuit has an inductance element composed of a coil-shaped electrode pattern. The rolling axis of the coil-shaped electrode pattern is formed in a direction vertical to the radiating plate. The power feeding circuit is magnetically coupled with the radiating plate.

Description

[0001] This application is a divisional case of the invention patent application with the application date of January 12, 2007, the application number "200780001074.5 (PCT / JP2007 / 050308)", and the invention title "wireless IC device and parts for wireless IC device" Apply. technical field [0002] The present invention relates to a power supply circuit, in particular to a power supply circuit that can be suitably mounted on a wireless IC device used in an RFID (Radio Frequency Identification, radio frequency identification) system. 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 descr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077H01Q1/22H01Q1/38H01Q9/16H04B5/00
CPCG06K19/07749G06K19/07756H01Q1/2208H01Q1/2225H01Q1/38H01Q9/16H04B5/0012H04B5/0056H01L2224/16225
Inventor 道海雄也加藤登石野聪
Owner MURATA MFG CO LTD
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