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Antenna device and portable radio communication device comprising such antenna device

A wireless communication device, antenna device technology, applied in the direction of antenna support/mounting device, transmission system, electrical components, etc., can solve the problems of unsatisfactory operation and poor antenna performance

Inactive Publication Date: 2012-12-05
LAIRD TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prior art conventional antenna structures, such as loop antennas or monopole antennas, mounted in the housing of a portable radio communication device do not provide satisfactory operation because the antenna either performs too poorly in a sufficiently wide frequency band, or Can only have sufficient performance in too narrow a frequency band

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

[0017] Preferred embodiments of the antenna device and the portable wireless communication device according to the present invention will be described in detail below.

[0018] In the following description and claims the term radiating element is used. It should be understood that the term covers conductive elements used to transmit and / or receive wireless signals.

[0019] First refer to figure 1 , shows the general structure of the antenna device 1 according to the present invention. It comprises a radiating element 10 in the form of a non-resonant sheet of conductive material, such as a metal sheet or a flexible film. Its size is, for example, 30 times 10 mm, and it is mounted on the rear cover of the portable radio communication device, thus constituting a built-in antenna radiator. Typical impedance values ​​for this type of antenna element are 5-j1000 ohms, but may vary with the application.

[0020] Alternatively, the radiating element 10 is in the form of an extern...

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PUM

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Abstract

An antenna device for a portable radio communication device comprises a radiating element (10) and an Rx amplifier (32). During operation, the output of the amplifier is connected to a receiver circuit (42). Means (34) are provided for interconnecting the radiating element and the output of the transmitter circuit (40) during transmitting operation. A conductor interconnects the radiating element and the input of the receiver circuit during both transmitting and receiving operation so that the radiating element can be used for both Tx and Rx with a minimum of circuitry.

Description

technical field [0001] The present invention generally relates to an antenna device, and more particularly to an antenna device for use in a wireless communication device such as a mobile phone, which antenna device is suitable for radio signals having a relatively low frequency, such as radio signals in the FM band. Background technique [0002] Internal antennas have been used in portable wireless communication devices for some time. There are many advantages to using internal antennas, not least of which is their small size and lightness, which makes them suitable for applications where size and weight are important, such as in mobile phones. [0003] However, the application of built-in antennas in mobile phones imposes some restrictions on the structure of antenna elements. In particular, the space for mounting a built-in antenna in a portable wireless communication device is limited. These limitations can make it difficult to find antenna structures that provide a wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/02H04B1/18H01Q1/24
CPCH04B1/18H04B1/48
Inventor 安德烈·凯科宁彼得·林德伯格卢卡斯·格林泽尔
Owner LAIRD TECH INC