Antenna arrangement and a module and a radio communications...

Details Antenna arrangement and a module and a radio communications... Antenna arrangement and a module and a radio communications...

2004-08-04

2008-10-28

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S702000, C343S770000

Reexamination Certificate

active

07443344

ABSTRACT:
An antenna arrangement for a radio communications apparatus such as a mobile phone, comprises a substantially planar patch conductor having a first feed connection point for connection to radio circuitry and a second feed connection point for connection to a ground plane, a first, differential slot in the patch conductor between the first and second connection points and a second, dual band slot located in the patch conductor outside the area between the first and second connection points. The length of the first slot is greater than a quarter wavelength, and provides a third resonant frequency increasing the bandwidth of the antenna. The width of the patch conductor between the first and the second slots is selected to obtain a low impedance transformation and thereby a low antenna resistance causing detuning the antenna. A user holding the phone increases the antenna resistance thereby tuning the antenna.

REFERENCES:
patent: 6624788 (2003-09-01), Boyle
patent: 6759991 (2004-07-01), Boyle
patent: EP 1304765 (2003-04-01), None

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