The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2007
Filed:
Oct. 10, 2003
Anders Thornell-pers, Åkersberga, SE;
Anders Thornell-Pers, Åkersberga, SE;
AMC Centurion AB, Akersberga, SE;
Abstract
The present invention relates to a method and an arrangement for optimizing the efficiency of a power amplifier () that is utilized for transmission of radio signals in a portable radio communication device, such as a mobile phone. The impedance loading the power amplifier () is controlled by a controller () in dependence on a transmission power of the portable radio communication device, wherein the radiating impedance of an antenna element () loading the power amplifier is controlled in dependence of the desired load impedance. Preferably, the changing of radiating impedance is performed by changing a capacitive coupling between the antenna element and a ground element or by changing the size of the antenna element. Better efficiency and bandwidth are thereby attained.