Title :
Broadband Doherty power amplifiers
Author :
Akbarpour, M. ; Helaoui, Mohamed ; Ghannouchi, Fadhel M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada
Abstract :
In this paper, the transformer-less load-modulated (TLLM) architecture for designing broadband Doherty amplifiers is presented. In this architecture, the quarter-wave impedance transformers of the Doherty amplifier are not used. As a result, the design will be much more compact and large operational bandwidths can be obtained. The simulation results for an amplifier implemented using this architecture shows that drain efficiency of higher than 47% is obtainable at 6dB power back-off in 1.7-2.8GHz frequency range (50% fractional bandwidth).
Keywords :
UHF power amplifiers; impedance convertors; wideband amplifiers; TLLM; broadband Doherty power amplifiers; frequency 1.7 GHz to 2.8 GHz; power back-off; quarterwave impedance transformers; transformer-less load-modulated architecture; Bandwidth; Impedance; Impedance matching; Modulation; Power amplifiers; Power generation; Transistors; Broadband amplifier; Doherty amplifier; Efficiency; PAPR; Power back-off;
Conference_Titel :
Power Amplifiers for Wireless and Radio Applications (PAWR), 2013 IEEE Topical Conference on
Conference_Location :
Santa Clara, CA
Print_ISBN :
978-1-4673-2915-6
Electronic_ISBN :
978-1-4673-2931-6
DOI :
10.1109/PAWR.2013.6490169
