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Antenna device and mobile communication unit

An antenna device, dual-frequency technology, applied to antenna support/installation devices, devices that enable antennas to work in different bands at the same time, antennas, etc., can solve the problem that the positional relationship between the two antenna coils cannot be changed freely, and cannot be quickly dealt with Issues such as design changes on the equipment side, difficulty in mass production with good yields, etc.

Inactive Publication Date: 2004-10-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, with the above existing structure, if the best antenna impedance characteristics are to be obtained, since the two antenna coils are fed and fixed together, the positional relationship between the two antenna coils cannot be freely changed, and the adjustment of the impedance can only be made by within a narrow range
[0009] Therefore, if the impedance seen from the antenna terminal of the duplex filter is changed by changing the design of the high-frequency circuit in the device main body, the antenna device corresponding to the changed impedance must be redesigned, and the design of the device side cannot be quickly handled. change
[0010] In addition, in the case of mass production, the two antenna coils must be arranged in a correct positional relationship so that the impedance of the antenna device does not vary, and the two antenna coils must be electrically connected to the high-frequency circuit inside the device body. , it is difficult to mass-produce with good yield

Method used

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  • Antenna device and mobile communication unit
  • Antenna device and mobile communication unit
  • Antenna device and mobile communication unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1 is a sectional view of main parts of an antenna device according to Embodiment 1 of the present invention, and is an antenna device for a mobile phone capable of performing transmission and reception of good communication in two frequency bands. In the figure, 1 is a first antenna element formed by helically winding a wire on the surface of a mandrel 4 made of an insulating resin material. At the lower end of the helical first antenna element 1, a metal plug 3 made of copper or copper alloy for electrical connection with the high-frequency circuit inside the mobile phone is formed, and one end of the helical wire is fixed by solder or the like to form a joint. 6.

[0060] The tall metal plug 3 is electrically connected with the high frequency circuit inside the mobile phone, so that the signal is fed to the first antenna element.

[0061] 2a is a second antenna element made of conductive material with an insulating film on the surface, has an electrical length of 1 / 2...

Embodiment 2

[0070] Fig. 6 is a sectional view of main parts of an antenna device according to Embodiment 2 of the present invention. In this figure, the same symbols are attached to the same structures as those in the first embodiment, and description thereof will be omitted.

[0071] The structure different from that of Embodiment 1 is the structure of the second antenna element 2b constituting the second antenna device 14. As shown in the figure, the second antenna element 2b is formed of three straight wires with an insulating coating layer on the surface. By adjusting the arrangement position of the second antenna element 2b on the first antenna element 1 so as to obtain a desired impedance characteristic, good communication can be transmitted and received in two frequency bands.

[0072] In addition, the impedance characteristic of the second antenna device 14 can also be adjusted by changing the length of each antenna element of the three straight wires and the distance between each...

Embodiment 3

[0074] 7 is a cross-sectional view of main parts of an antenna device according to Embodiment 3 of the present invention. In this figure, the same structures as those in Embodiment 1 are given the same symbols and their descriptions are omitted.

[0075] This embodiment is the following antenna device, that is, on the helical first antenna element 1 shown in Embodiment 2, the F-shaped second antenna element 2c having an insulating film layer on the surface is arranged at a position where the desired antenna element 2c can be obtained. The location of the impedance characteristics, thereby enabling good communication transmission and reception in the two frequency bands.

[0076] The impedance characteristic of the third antenna device 15 can be adjusted by changing the length of the antenna element part 2c' in the horizontal direction of the second antenna element 2c and changing the intersection point with the antenna element 2c'' in the vertical direction.

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PUM

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Abstract

An antenna device used for a mobile communication unit such as a portable telephone operates satisfactorily on two or more frequency bands, can be adjusted to control its impedance characteristic, and can be manufactured with high yield. This antenna device comprises a first spiral antenna element (1) having one end open and the other end connected electrically with a high frequency circuit inside a communication terminal, and a second antenna element (2) having both ends open and arranged either outside or inside the first antenna element (1). The second antenna element (2) is electrically insulated from the first antenna, and its position is adjustable relative to the first antenna element to control the impedance characteristic of the antenna device.

Description

technical field [0001] The present invention relates to an antenna device capable of performing good transmission and reception in two or more frequency bands used in mobile communication devices such as mobile phones. Background technique [0002] FIG. 14 shows an example of an antenna device used in a mobile communication device such as a conventional mobile phone. In the figure, 102 is a transmitting and receiving part, and the main case 101 is formed around this. In the upper part of the main housing 101 , a pair of antenna coils 103 , 104 are integrally provided in a common housing 110 . [0003] The two antenna coils 103 and 104 are arranged on the same axis, the upper antenna coil 103 is connected to the transmitting part 105 of the transmitting and receiving part 102 through the duplexer 107, and the lower antenna coil 104 is connected to the transmitting and receiving part through the duplexer 107. The receiving part 106 of the part 102. [0004] The electrical l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q5/10H01Q1/24H01Q1/36H01Q1/38H01Q11/08H01Q19/28
CPCH01Q5/385H01Q1/244H01Q19/28H01Q1/38H01Q5/0068H01Q5/0062H01Q5/378H01Q1/241H01Q5/0065H01Q5/392H01Q11/08H01Q1/362H01Q5/10H01Q1/24
Inventor 福岛奖汤田直毅大原正广
Owner PANASONIC CORP