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Antenna device and portable radio communication device comprising such antenna device

A wireless communication device and antenna device 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 of increased noise index, reduced antenna performance, and reduced internal antenna performance, etc. question

Inactive Publication Date: 2013-07-17
LAIRD TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple switching solutions are not available for active antennas due to the parasitic capacitance and inductance in conventional 50 ohm switches degrading the performance of the antenna
This switching structure also degrades the performance of the internal antenna due to increased noise figure

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] Next, preferred embodiments of the antenna device and the portable wireless communication device according to the present invention will be described in detail.

[0023] In the following description and claims, the term "radiating element" is used. It should be understood that this term is intended to cover conductive elements designed to receive wireless signals.

[0024] First, refer to figure 1 , which shows the general construction 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, such as a metal sheet or a flex film. An example of its size is 30 mm x 10 mm, placed on the back cover of the portable radio communication device, thus constituting the internal antenna radiator.

[0025] The antenna arrangement 1 also comprises a second radiating element 20 in the form of an external cable, preferably an external headphone cable, but also other cables. The ...

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PUM

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Abstract

An antenna device for a portable radio communication device adapted for receiving radio signals a first radiating element (10) and a second radiating element (20). A filter and amplifier stage (30) interconnects the first radiating element and a receiver device for radio signals. By operating in two modes, wherein the second radiating element (20) is connected and disconnected, respectively, an antenna device can operate depending on operating conditions and user preferences.

Description

technical field [0001] The present invention relates generally to antenna devices, and more particularly to antenna devices for use in wireless communication devices such as mobile telephones, which are adapted to relatively low frequency radio signals, such as radio signals in the FM band. Background technique [0002] In portable wireless communication devices, internal antennas have been used for some time. The advantages associated with the use of internal antennas are numerous, notable among which is that they are small and light, making them suitable for applications where size and weight are important (eg in mobile phones). [0003] However, the use of internal antennas in mobile phones imposes some restrictions on the construction of the antenna unit. Specifically, in portable wireless communication devices, the space available for internal antenna structures is limited. These limitations can make it difficult to find configurations for antennas that provide a wide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/24H01Q5/10
CPCH04B1/18H01Q1/242H01Q21/28H04B1/0064H04B1/3805
Inventor 安德烈·凯科宁彼得·林德伯格史蒂芬·勒夫格伦
Owner LAIRD TECH INC