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Antenna device and portable radio communication device comprising such antenna device

A technology of wireless communication device and antenna device, which is applied to antenna supports/installation devices, antennas, resonant antennas, etc., can solve the problems of interfering with FM antenna operation and infeasible solutions.

Inactive Publication Date: 2009-09-23
LAIRD TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution is obviously not feasible if the presence of an external antenna is not allowed
[0006] Another problem is having a second antenna in the same communication device as the FM antenna, for example a GSM antenna, which interferes with the operation of the FM antenna

Method used

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  • Antenna device and portable radio communication device comprising such antenna device
  • Antenna device and portable radio communication device comprising such antenna device
  • Antenna device and portable radio communication device comprising such antenna device

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Embodiment Construction

[0022] Preferred embodiments of the antenna device and the portable wireless communication device according to the present invention will be specifically described below.

[0023] The term "radiating element" is used in the following description and claims. It should be understood that the term is intended to cover conductive elements used to receive and / or transmit radio signals.

[0024] First, refer to figure 1 , shows the overall structure of the antenna device 1 according to the present invention. It comprises a first radiating element 10 in the form of a non-resonant piece of conductive material. The first radiating element is part of a half-loop antenna, which will be described in detail below. A half-loop antenna means that the first radiating element is part of a loop, wherein the loop includes part of the ground plane. Thus, the non-resonant piece of conductive material essentially forms a half-loop, and the loop is closed by the ground plane.

[0025] The first...

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PUM

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Abstract

An antenna device for a portable radio communication device, preferably for the FM frequency range, comprises a radiating element (10), and an amplifier stage. By providing the radiating element as a half-loop radiating element, the noise figure is essentially flat across the entire operating frequency range, giving adequate signal to noise ratio despite gain variances.

Description

technical field [0001] The present invention relates generally to antenna arrangements, and more particularly to antenna arrangements for wireless communication devices, such as mobile telephones, adapted for signals having relatively low frequencies, such as radio signals in the FM band. Background technique [0002] Internal antennas have been used in portable wireless communication devices for some time. Among the many advantages of using an internal antenna, the small size and light weight make it suitable for applications where size and weight are critical, such as mobile phones. [0003] However, the application of built-in antennas in mobile phones imposes certain constraints on the structure of the antenna elements. More specifically, in portable radio communication devices, the space for arranging a built-in antenna is limited. These constraints make it difficult to find suitable antenna structures for wide operating frequency bands. This difficulty is all the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/24H04B1/18
CPCH01Q21/28H01Q1/243H01Q9/42H01Q7/06H01Q7/00
Inventor 安德烈·凯科宁彼得·林德伯格
Owner LAIRD TECH INC