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Information terminal

A technology of information terminals and equipment, which is applied in the direction of loop antennas, radiation element structures, electrical components, etc., to achieve the effects of miniaturization, damage and aesthetic damage

Inactive Publication Date: 2009-06-10
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this information terminal device, if a new wireless system is to be used, a wireless communication card with an antenna for the new wireless system also needs to be used, and there is the same problem as that of the device described in the aforementioned Patent Document 1.

Method used

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Embodiment Construction

[0032] Embodiments of the information terminal equipment involved in the present invention will be described below with reference to the accompanying drawings.

[0033] (The first example of the antenna, refer to Figure 1 ~ Figure 4 )

[0034] First, a first example of a small-sized broadband antenna used in an information terminal device according to the present invention will be described. Such as figure 1 As shown in FIG. 1 as an equivalent circuit, this antenna 1A adopts the following structure, that is, has components A, B, and C each composed of two LC series resonant circuits. The LC series resonant circuits included in each component A, B, and C have inductance elements L1, L2; L3, L4; L5, L6 that are magnetically coupled to each other (indicated by symbol M), and the inductance elements L1, L3, and L5 pass through the capacitive elements respectively. C1a, C1b; C3a, C3b; C5a, C5b are connected to the feed terminals 5, 6, and connected in parallel with the inductan...

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PUM

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Abstract

An information terminal device that can support almost all of the frequency bands of a plurality of radio systems is provided. The information terminal device includes a casing, a wireless board (110A), and one of an antenna (1A) and an antenna (1B) so as to employ a plurality of radio systems. One of the antenna (1A) and the antenna (1B) includes a power feeding terminal and a plurality of resonant circuits. The plurality of resonant circuits are used for radiating radio waves. The plurality of resonant circuits are further used for a matching circuit that provides impedance matching between an impedance on a power feeding side as viewed from the power feeding terminal (50 CR ) and a radiation impedance of a free space (377 CR ).

Description

technical field [0001] The present invention relates to an information terminal device, for example, an information terminal device such as a notebook personal computer using a plurality of wireless systems. Background technique [0002] In recent years, for W-CDMA (Wideband-Code Division Multiple Access: Wideband Code Division Multiple Access), GSM (Global System for Mobile communication: Global System for Mobile Communications), wireless LAN (Local Area Network: local area network), digital TV broadcasting, Wireless services for portable devices such as WiMAX (Worldwide interoperability for Microwave Access: Worldwide Interoperability for Microwave Access) and vehicles are increasing. As shown in Figure 13, frequencies in a wide band from 400MHz to over 5GHz are used. [0003] Moreover, information terminal equipment that combines PHS (Personal Handy-phone System: personal mobile phone system) and wireless LAN has been provided now; W-CDMA, 3-band GSM, wireless LAN, and DV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H01Q1/38H01Q9/04H01Q21/30H04B1/38
CPCH04B1/0458H01Q7/00H01Q1/2275H04B1/18H04B1/38H01Q21/30
Inventor 加藤登万代治文木村育平
Owner MURATA MFG CO LTD
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