Broadband Doherty power amplifiers: Advances and challenges

Author

Boumaiza, Slim ; Golestaneh, Hamed ; Ali Abadi, Mehdi Naseri ; Mohamed, Ahmed M. M. ; Wu, D.Y.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada

fYear

2014

fDate

6-6 June 2014

Firstpage

1

Lastpage

6

Abstract

This paper expounds on the recent advancements in the area of broadband Doherty power amplifiers (DPA). It begins by outlining the major sources of performance limitations in DPAs when employed to efficiently amplify multi-band signals scattered over extended frequency bandwidth. It goes on to describe a number of novel techniques devised to broaden the bandwidth of classical two-way DPAs. Finally, a broadband three-way DPA is introduced as a potential solution to efficiently amplify signals with extended peak to average power ratios. Measurement results obtained using a number of broadband DPA demonstrators are reported.

Keywords

UHF power amplifiers; wideband amplifiers; broadband DPA demonstrators; broadband Doherty power amplifiers; extended frequency bandwidth; extended peak-to-average power ratios; multiband signal amplification; performance limitations; Bandwidth; Broadband amplifiers; Impedance; Peak to average power ratio; Power amplifiers; Transistors; Doherty power amplifier; high peak-to-average power ratio signals; multi-band multi-standard communication transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless and Microwave Technology Conference (WAMICON), 2014 IEEE 15th Annual

Conference_Location

Tampa, FL

Type

conf

DOI

10.1109/WAMICON.2014.6857793

Filename

6857793