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Multiple band antenna

An antenna structure and sub-harmonic technology, which can be applied to antennas, resonant antennas, helical antennas, etc., can solve the problems of complex and large matching structure, and achieve the effect of low production cost.

Inactive Publication Date: 2005-08-03
PULSE FINLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A common disadvantage in the configuration according to Figure 1 and in comparable configurations for multi-band use is that only two or at most three bands can be used
Indeed, one can have as many bands as one wants by adding components, however the matching structure becomes bulky and complex

Method used

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Examples

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Embodiment Construction

[0023] Figure 1 has already been discussed in conjunction with the description of the prior art.

[0024] Figure 2a shows a side view of an example of an antenna structure according to the invention. It includes a helical antenna element 210 , a joint 220 and an antenna feed wire 230 . Similar to the structure shown in FIG. 1 , the pitch in the helical vibrator becomes smaller and smaller from the lower end to the upper end of the vibrator. The terms "lower", "upper", "horizontal", "vertical" in these descriptions and claims refer to the position of the antenna structure shown in Figure 2, and they are not related to the operating position of the antenna. The joint 220 includes a top 221 , a threaded portion 222 , a bottom 223 , a connecting portion 224 , a counterpart 225 , and a protruding portion 226 . All these parts are electrically conductive and are in electrical contact with each other. The horizontal protrusion 226 is connected to the counterpart 225 at one end. I...

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Abstract

The invention relates to a multiband antenna structure suitable for mobile stations in particular. The radiating elements of the antenna include not only a helix (210) but also the joining piece (220) that attaches the helix to the apparatus. The helix is shaped such that the distance between its conductor turns varies. The electrical length of the joining piece is increased e.g. by means of a conductive projection (226) that remains within the covering of the apparatus. By suitably dimensioning the parts, at least five of the resonances that the helix and joining piece have together and separately are arranged at useful points on the frequency scale. The structure according to the invention is despite the several bands simple and relatively low in production costs.

Description

technical field [0001] The present invention relates to multi-band antennas particularly suitable for use in mobile stations. Background technique [0002] The development of mobile stations is moving towards devices that operate in multiple frequency bands. Initially, each mobile phone only worked on one frequency band. Then, models operating in two frequency bands such as GSM900 and GSM1800 systems were introduced into the market. The introduction of WCDMA (Wideband Code Division Multiple Access) technology and the extension of GSM (Global System for Mobile Communications) technology to frequency bands previously used by the NMT450 system have resulted in the manufacture of models operating in even more frequency bands. This means additional requirements are thus placed on the antenna of the mobile communication device in question. [0003] Several antenna structures operating in at least two frequency bands are known from the prior art. These structures generally cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/24H01Q1/36H01Q5/00H01Q5/357H01Q9/40H01Q11/08
CPCH01Q1/243H01Q5/0051H01Q1/362H01Q9/40H01Q5/357
Inventor P·安纳马尔
Owner PULSE FINLAND
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