Semi-analytic design method for dual-band power amplifiers

Author

Zhijiang Dai ; Songbai He ; Jingzhou Pang ; Chaoyi Huang

Author_Institution

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

Volume

51

Issue

17

fYear

2015

Firstpage

1336

Lastpage

1337

Abstract

A semi-analytic method is presented for dual-band power amplifier design. A commensurate transmission line is applied to reduce the number of independent variables in a given topology so that the optimisation algorithm would be more robust to handle it. At the same time, it could be described as a rational function. To pursue a good performance at the two bands, continuous mode is also considered for controlling the harmonics. The impedance of the lower band is controlled up to the third harmonic, while that of the upper band is up to the second harmonic. The efficiency of the dual band is, respectively, 69.4 and 70.7%, and the corresponding output power is 41.7 and 41.5 dBm at 2.4 and 3.45 GHz, respectively.

Keywords

UHF power amplifiers; circuit optimisation; harmonic analysis; microwave power amplifiers; rational functions; transmission lines; commensurate transmission line; continuous mode; dual-band power amplifier; efficiency 69.4 percent; efficiency 70.7 percent; frequency 2.4 GHz; frequency 3.45 GHz; harmonics control; independent variable reduction; lower band impedance; optimisation algorithm; rational function; semianalytic design method;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2015.0830

Filename

7199756