Efficiency-enhanced inverted Doherty power amplifier with class-E peaking amplifier

Author

You, Changjiang ; Zhu, Xiaowei ; Wang, Jingqi ; Liao, Zhongyu

Author_Institution

State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China

Volume

2

fYear

2010

fDate

17-20 Sept. 2010

Firstpage

1

Lastpage

3

Abstract

In this design, the class-E amplifier is used as peaking amplifier in place of the class-C amplifier in the traditional inverted Doherty amplifier to obtain higher power-added efficiency. The load network of class-E peaking amplifier consists of one impedance matching network and two harmonic suppression structures. To validate the analysis, a 38 dBm inverted Doherty amplifier with class-E peaking amplifier is designed and fabricated at 1.96 GHz. The simulated results show that 11.5% and 1.1% power-added efficiency improvement is obtained in comparison to balanced class-AB amplifier and traditional inverted Doherty amplifier at an output power of 38dBm respectively. The second and third harmonics were measured to be less than -36dBc and -30dBc, respectively, at output power ranges of 24dBm to 38dBm.

Keywords

UHF power amplifiers; class-C amplifier; class-E peaking amplifier; efficiency 1.1 percent; efficiency 11.5 percent; efficiency-enhanced inverted Doherty power amplifier; frequency 1.96 GHz; harmonic suppression structures; impedance matching network; power-added efficiency; Doherty power amplifier; class-E power amplifier; inverted Doherty power amplifier; power-added efficiency;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals Systems and Electronics (ISSSE), 2010 International Symposium on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-6352-7

Type

conf

DOI

10.1109/ISSSE.2010.5606968

Filename

5606968