High efficiency Doherty amplifier combining digital adaptive power distribution and dynamic phase alignment

Author

Darraji, Ramzi ; Ghannouchi, Fadhel M.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada

fYear

2013

fDate

7-9 April 2013

Firstpage

1

Lastpage

3

Abstract

This paper reports a Doherty power amplifier (PA) with significantly improved efficiency over large output power range. The efficiency enhancement is accomplished by associating digital adaptive power distribution and dynamic phase alignment mechanisms, which are implemented to prevent the efficiency degradation due to the problems of input drive waste at back-off, power-dependent phase misalignment between carrier and peaking branches, and impaired load modulation behavior. The measured average efficiency of the proposed Doherty PA is 53% compared to 45% for a standard Doherty PA.

Keywords

modulation; power amplifiers; digital adaptive power distribution; dynamic phase alignment; high efficiency Doherty amplifier; load modulation; output power range; Radio frequency; Adaptive power splitting; Doherty power amplifier; digital phase alignment; dual-input architecture; efficiency;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless and Microwave Technology Conference (WAMICON), 2013 IEEE 14th Annual

Conference_Location

Orlando, FL

Print_ISBN

978-1-4673-5536-0

Electronic_ISBN

978-1-4673-5535-3

Type

conf

DOI

10.1109/WAMICON.2013.6572765

Filename

6572765