Title :
Dynamic load modulation of high power amplifiers with varactor-based matching networks
Author :
Tehrani, Ali Soltani ; Nemati, Hossein Mashad ; Cao, Haiying ; Eriksson, Thomas ; Fager, Christian
Author_Institution :
GigaHertz Centre, Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
In this paper, the results of dynamic load modulation on a high power amplifier is shown with experiments. A simple static nonlinear model is used as an inverse model, and by dynamically controlling both the input signal to the power amplifier and the load impedance, high efficiency operation of the power amplifier is achieved. The modulated measurements show the feasibility of dynamic load modulation for practical high power, high frequency applications.
Keywords :
impedance matching; modulation; power amplifiers; varactors; dynamic load modulation; dynamical control; high power amplifier; load impedance matching network; static nonlinear model; varactor; Baseband; High power amplifiers; Impedance measurement; Inverse problems; Power amplifiers; Power measurement; RF signals; Radiofrequency amplifiers; Signal design; Transmitters; Efficiency; load modulation network; power amplifiers; tunable-matching networks;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5166002
