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

fYear

2013

fDate

20-20 Jan. 2013

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/PAWR.2013.6490169

Filename

6490169