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Structure and radio device with the same antenna structure

An antenna structure and antenna technology are applied to devices, antenna supports/installation devices, antennas, etc. that make the antenna work in different frequency bands at the same time. The effect of bandwidth

Inactive Publication Date: 2005-04-27
PULSE FINLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this structure shown in Figure 1 is that the miniaturization trend of antennas for small mobile stations will bring about a sharp deterioration in the electrical performance of the antenna

Method used

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  • Structure and radio device with the same antenna structure
  • Structure and radio device with the same antenna structure
  • Structure and radio device with the same antenna structure

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] Figure 1 has already been discussed above in the description of the prior art.

[0020] figure 2 The example shows the antenna structure according to the invention. The antenna 200 includes a ground plane 210 , on top of which is a first radiation plane 220 , and on top of it is a second radiation plane 230 . The terms "top" and "topmost" used in this application refer to the horizontal relative positions of the antenna components with the ground plane as the lowermost. Between the ground plane and the first radiating plane is mainly air and a bit of support material with a low dielectric constant. Between the first and second radiating panels is a first dielectric plate 240 with a higher dielectric constant. On top of the second radiating panel is a second dielectric plate 250 . The inner conductor 201 of the antenna feeder is connected at point F to the first radiating panel 220 through a hole 211 in the ground panel. According to this PIFA structure, the first r...

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Abstract

The invention relates to an antenna structure to be installed inside small-sized radio apparatus. A conventional PIFA-type structure is extended such that on top of the ground plane there will be instead of one at least two radiating planes on top of each other. There is between them dielectric material to reduce the size of the lower radiator and to improve the band characteristics. Likewise, there is dielectric material on top of the uppermost radiating plane so as to bring one resonance frequency of the antenna relatively close to another resonance frequency in order to widen the band. Advantageously the radiating planes are in galvanic contact with each other. The invention accomplishes a greater increase in the antenna bandwidth as compared to that achieved by placing the only radiating plane at a distance from the ground plane equal to that of the upper radiating plane according to the invention.

Description

technical field [0001] The present invention relates to an antenna structure incorporated in a small radio device and a radio device. Background technique [0002] It is highly desirable for portable radios to locate the antenna inside the cover of the device, since protruding antennas are inconvenient. In modern mobile stations, for example, the internal antenna must have very small dimensions. This need is further intensified as mobile stations become smaller and smaller. Also, in a dual-band antenna, the upper operating band should at least be relatively wide, especially if the device is intended to operate in more than one system using the 1.7-2 GHz band. [0003] For practically small-sized antennas, the most common solution is to use a PIFA (Planar Inverted-F Antenna). The performance such as bandwidth and efficiency of such an antenna operating in a given frequency band depends on the size of the antenna: the larger the size, the better the characteristics and vice...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/40H01Q5/00H01Q9/04
CPCH01Q1/40H01Q9/0421H01Q5/0058H01Q5/0062H01Q9/0414H01Q5/371H01Q5/378
Inventor P·安纳马尔J·米科拉
Owner PULSE FINLAND