1.7/2.6 GHz high-efficiency concurrent dual-band power amplifier with dual-band harmonic wave controlled transformer

Author

Peng Chen ; Songbai He ; Xianfei Wang ; Zhijiang Dai

Author_Institution

Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

50

Issue

3

fYear

2014

fDate

January 30 2014

Firstpage

184

Lastpage

185

Abstract

A 1.7/2.6 GHz high-efficiency concurrent dual-band power amplifier (DBPA) with a dual-band harmonic wave controlled transformer is demonstrated. The proposed dual-band transformer, which transfers the fundamental and the second harmonic impedances of each frequency, is directly transmission line implemented with the help of an optimisation algorithm. The measurement results show that the proposed DBPA has performances of 70 and 64% power added efficiency with an 11 dB gain and a 41 dBm output power at 1.7 and 2.6 GHz, respectively. Its average drain efficiency is more than 42% and the adjacent channel leakage ratios are lower than -46 dBc at both frequencies with the digital predistortion adjustment for a 5 MHz WCDMA signal input.

Keywords

UHF power amplifiers; optimisation; transformers; transmission lines; DBPA; WCDMA signal input; adjacent channel leakage ratio; digital pre-distortion adjustment; dualband harmonic wave controlled transformer; efficiency 64 percent; efficiency 70 percent; frequency 1.7 GHz; frequency 2.6 GHz; frequency 5 MHz; gain 11 dB; high-efficiency concurrent dualband power amplifier; optimisation algorithm; power added efficiency; second harmonic impedance; transmission line;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.3781

Filename

6731751