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Card device

A card device and card substrate technology, which is applied to instruments, computing, electrical components, etc., can solve problems such as the reduction of received signals, and achieve the effect of suppressing the reduction of impedance

Inactive Publication Date: 2011-06-08
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the impedance of the antenna terminal decreases, due to the impedance mismatch of the antenna terminal, the reflection of the transmitted and received signal will occur, and the problem of the decrease of the transmitted and received signal will occur.

Method used

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Embodiment Construction

[0029] Embodiments of the present invention will be described below with reference to the drawings.

[0030]

[0031] figure 1 It shows the plan view of the mobile communication terminal and the wireless network card of the present invention. figure 1 (A) shows a plan view of an example of a mobile communication terminal. Here, the state where the back cover of the mobile communication terminal 10 is removed is shown. In the mobile communication terminal 10 , for example, a card device connector 12 is provided near the battery pack 11 . Insert and install the wireless network card ( figure 1 (B)). The wireless network card can be installed and removed freely.

[0032] The mobile communication terminal 10 is also equipped with an antenna 13 for a frequency band of 2.4 GHz for Bluetooth. In addition to the antenna 13, the mobile communication terminal 10 is equipped with an antenna for mobile communication, a one-seg antenna for terrestrial digital broadcasting, and the ...

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PUM

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Abstract

The technology problem to be solved in the invention is to provide a card device capable of restraining impedance of an antenna terminal from increasing. The card device for mounting in a mobile wireless communication terminal having an antenna includes a card substrate (40) having a multilayer configuration. The card substrate includes a surface wiring layer (48) on which an antenna terminal (22) is formed for connecting to the antenna (13), and another wiring layer (46) facing the surface wiring layer (48) and being at ground potential. The other wiring layer (46) includes a conductor notch part (52) formed at a position corresponding to a position of the antenna terminal.

Description

technical field [0001] The present invention relates to a card device for wireless communication installed in a mobile communication terminal. Background technique [0002] Mobile communication terminals such as mobile phones are widely equipped with wireless functions such as infrared transmission and reception and Bluetooth (registered trademark) for short-distance data transmission. Furthermore, it is desired to add a wireless network (LAN) function to the mobile communication terminal for medium-distance data transmission. [0003] In the case of adding a wireless network function, a wireless network (LAN) card is formed by mounting a circuit module of a wireless network including an antenna terminal on a card device such as a micro SD card, and the wireless network card is mounted on a mobile communication device. It is implemented by connecting the antenna provided on the mobile communication terminal to the antenna terminal of the wireless network card when on the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077H04W88/02H04B1/38H04B1/3822
CPCG06K19/07732G06K19/077G06K19/07754H04B1/38H04W88/02
Inventor 有村尚吾
Owner MITSUMI ELECTRIC CO LTD