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Built-in antenna for radio communication terminal

A technology for wireless communication terminals and built-in antennas, which can be used in antennas, resonant antennas, antenna components, etc., and can solve problems such as gain reduction

Inactive Publication Date: 2003-01-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the plate-shaped inverted F antenna 2 used in the conventional wireless communication terminal has the following problem: the gain is lowered due to the influence of the human body of the user of the wireless communication terminal.
[0013] As described above, in the plate-shaped inverted F antenna 2 used in the above-mentioned conventional wireless communication terminal, there is a problem that the gain is lowered due to the influence of the human body.
[0014] Furthermore, the diversity antenna used in the above-mentioned existing wireless communication terminal also has the same problem as above when the plate-like inverted F antenna 2 works.

Method used

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  • Built-in antenna for radio communication terminal
  • Built-in antenna for radio communication terminal
  • Built-in antenna for radio communication terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Image 6 It is a schematic structural diagram of the built-in antenna of the wireless communication terminal according to Embodiment 1 of the present invention. Each element shown in this figure is mounted in a housing of the wireless communication terminal, and the overall view of the wireless communication terminal is omitted for simplicity of description.

[0090] The built-in antenna for a wireless communication terminal in this embodiment includes a ground plate 11 , a dipole antenna 12 , a balun circuit 13 , and a feeder 14 . Hereinafter, each constituent element will be described.

[0091] The ground plate 11 is a plate-shaped ground conductor, and is mounted parallel to a surface (vertical surface) on which unillustrated operation buttons, a display, a speaker, and the like are provided on the wireless communication terminal.

[0092] The dipole antenna 12 is composed of two antenna elements formed in a rectangular wave shape (comb shape). This reduces the si...

Embodiment 2

[0101] Embodiment 2 is a form in which the method of attaching dipole antenna 12 in Embodiment 1 is changed. Embodiment 2 is the same as Embodiment 1 except for the method of mounting the dipole antenna 12, so detailed description thereof will be omitted. Below, use Figure 8 The difference between the built-in antenna of the wireless communication terminal of this embodiment and that of Embodiment 1 will be described. The same reference numerals are assigned to the same parts as those in Embodiment 1, and detailed description thereof will be omitted.

[0102] Figure 8 It is a schematic structural diagram of the built-in antenna of the wireless communication terminal according to Embodiment 2 of the present invention. As shown in the figure, the wireless communication terminal built-in antenna according to the second embodiment includes: a ground plate 11 , a dipole antenna 12 a , a balun circuit 13 , and a feeder terminal 14 .

[0103] The dipole antenna 12a is installed...

Embodiment 3

[0107] Embodiment 3 is a mode in which the configuration and mounting method of dipole antenna 12 are changed from Embodiment 1. FIG. Embodiment 3 is the same as Embodiment 1 except for the structure and mounting method of the dipole antenna 12 , so detailed description thereof will be omitted. Below, use Figure 9 The difference between the built-in antenna of the wireless communication terminal of this embodiment and that of Embodiment 1 will be described. The same reference numerals are assigned to the same parts as those in Embodiment 1, and detailed description thereof will be omitted.

[0108] Figure 9 It is a schematic structural diagram of the built-in antenna of the wireless communication terminal according to Embodiment 3 of the present invention. As shown in the figure, the built-in antenna for a wireless communication terminal according to Embodiment 3 includes: a ground plate 11 , a dipole antenna 21 , a balun circuit 13 , and a feeder terminal 14 . The two a...

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PUM

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Abstract

A radio communication terminal built-in antenna allowing high gains and exhibiting a less influence on a human body. In this radio communication terminal built-in antenna, an antenna element constituting a dipole antenna (321) is opposed to a second parasitic element (392) shaped like a rod. The spacing between the second parasitic element (392) and the antenna element (321) is appropriately established by changing the mutual impedance therebetween such that the input impedance characteristic provides a wide band.

Description

technical field [0001] The present invention relates to a built-in antenna used in a wireless communication terminal. Background technique [0002] In recent years, in order to improve the portability of wireless communication terminals, their miniaturization is being promoted. Along with this, miniaturization of built-in antennas used in wireless communication terminals is also required. As a conventional built-in antenna for satisfying this requirement, a planar inverted-F antenna is used in some cases. Hereinafter, built-in antennas used in conventional wireless communication terminals will be described. [0003] figure 1 It is a structural schematic diagram of an internal antenna used in an existing wireless communication terminal. Each element shown in this figure is mounted in a housing of the wireless communication terminal, and the overall view of the wireless communication terminal is omitted for simplicity of description. As shown in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/24H01Q1/36H01Q9/26H01Q19/30
CPCH01Q9/26H01Q1/36H01Q1/243H01Q1/245H01Q19/30
Inventor 伊藤英雄江川洁
Owner PANASONIC CORP