Antenna and raido device comprising same

A technology for wireless devices and antennas, which is applied to devices that enable antennas to work in different bands simultaneously, antenna supports/mounting devices, antennas, etc., and can solve problems such as impedance characteristic errors, inability to obtain impedance characteristics, and impedance characteristic deterioration. The effect of achieving good impedance characteristics

Inactive Publication Date: 2002-12-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the existing antenna structure, there is a problem that even if radio waves in a certain frequency band can be transmitted and received well, radio waves in other frequency bands cannot be transmitted and received well.
[0008] Moreover, there is such a problem in this existing antenna that in the process of manufacturing the antenna element 3, the diameter and pitch of the helical part 2 are not uniform, and some helical parts 2 are deformed, so that the impedance characteristics produce errors, and the desired impedance cannot be obtained. characteristic
In addition, there is a problem that a complex impedance matching circuit is provided between the antenna and the high-frequency circuit part of the mobile phone to compensate for the deterioration of the impedance characteristics caused by the error, which hinders the cost reduction of the mobile phone.

Method used

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  • Antenna and raido device comprising same
  • Antenna and raido device comprising same
  • Antenna and raido device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Fig. 1 is a partially cutaway perspective view of the antenna according to Embodiment 1 of the present invention, Fig. 2 is its outline view, Fig. 3 is its main sectional view, and Fig. 4 is its right side sectional view. The antenna element 11 in FIG. 1 is formed as follows.

[0045] The substantially spiral portion 12 is formed by punching and extruding a thin metal plate having good conductivity such as a copper alloy plate. The roughly serpentine portion 13 is also formed by punching and extruding a thin conductive metal plate such as a copper alloy plate. The antenna element 11 is formed in such a shape that the substantially helical portion 12 and the substantially serpentine portion 13 are connected at respective upper end portions, and both are folded back at this portion. The power supply connector 14 is connected and fixed to one terminal 13A (refer to FIG. 3 ) of the roughly serpentine portion 13 of the antenna element 11, and has a threaded portion 14A (ref...

Embodiment 2

[0057] 7 is a front sectional view of an antenna device according to Embodiment 2 of the present invention, and FIG. 8 is a right side sectional view. The components having the same structure as those in Embodiment 1 are given the same reference numerals, and detailed descriptions are omitted. As shown in FIGS. 7 and 8, the antenna element 11 is the same as the first embodiment (refer to FIG. 1), by punching and extruding a thin conductive metal plate such as a copper alloy plate to form a substantially helical portion 12 and a substantially helical portion. The serpentine part 13 , these substantially helical parts 12 and the substantially serpentine part 13 can be connected at a connection part 21 near the upper end of the mandrel 24 . In the present embodiment, as shown in FIG. 7 , the antenna element 11 and the power supply terminal 23 having the reed-shaped contact portion 22 are integrally formed continuously from the lower end portion 13A of the substantially serpentine ...

Embodiment 3

[0059] FIG. 9 is a circuit diagram of a wireless device equipped with an antenna device according to Embodiment 3 of the present invention. The components having the same configuration as those in Embodiments 1 to 4 are given the same reference numerals, and detailed description thereof will be omitted. As shown in Figure 9, the antenna (refer to Figures 1 and 2) is assembled on the insulating resin frame 27 of the wireless device 26, and inside the wireless device 26, the power supply connector 14 of the antenna is connected to the switch 29 by the power supply line 28. , are connected to the high-frequency circuit 30 for the first frequency band and the high-frequency circuit 31 for the second frequency band through the switch 29 .

[0060] With this embodiment, not only can the antenna be simply assembled on the wireless device 26, but also the antenna has impedance characteristics corresponding to desired multiple frequency bands, so that the high-frequency circuit part of ...

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PUM

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Abstract

An antenna with high gain, reliability, and production efficiency capable of receiving radio waves of multiple frequencies and a wireless device using the antenna. One end of the power supply part is electrically connected to the antenna element part, and the other end is electrically connected to the high frequency circuit of the wireless device. The antenna element portion is mechanically held by a mandrel made of a dielectric material. The radome made of a dielectric material covers part of the antenna element part and the feeding part. Furthermore, the antenna element portion is composed of a substantially spiral portion and a substantially serpentine portion formed by a thin strip-shaped conductive thin plate concentric with the mandrel. Good impedance characteristics can be achieved in multiple frequency bands by appropriately setting the dimensions of the substantially helical portion and the substantially serpentine portion.

Description

technical field [0001] The present invention relates to an antenna installed in a wireless device for mobile communication and the like and a wireless device using the antenna. Background technique [0002] In recent years, as the demand for wireless devices for mobile communications has increased rapidly, their forms have been diversifying. One of them is to develop a wireless device that can transmit and receive radio waves in multiple frequency bands so that more information can be processed by a single wireless device, and an antenna that exhibits good impedance characteristics in multiple frequency bands is used for this. [0003] A typical example of such mobile communication is a mobile phone system, which is widely used all over the world, and the frequency bands used vary depending on the region. For example, in terms of the frequency band used by the digital mobile phone system, Japan's Personal Digital Cellular 800 (PDC800) is 810~960MHz, and the European and Ame...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01F5/00H01Q1/24H01Q1/36H01Q1/40H01Q5/10H01Q5/357H01Q9/30
CPCH01Q1/242H01Q1/36H01Q1/362H01Q1/40H01Q5/00H01Q5/357H01Q1/27
Inventor大原正广福村丰史
OwnerPANASONIC CORP