A L-band high efficient power amplifier in CPW techniques

Author

Ren, Qiming ; Gao, Yingjie ; Wolff, Ingo

Author_Institution

Dept. of Electr. Eng., Gerhard Mercator Univ., Duisburg, Germany

Volume

3

fYear

1997

fDate

2-5 Dec 1997

Firstpage

1109

Abstract

In this paper a L-band hybrid integrated amplifier in CPW techniques with high power added efficiency is presented. A new phenomenon was observed in the experiments. The experiments show that although different bias points at class A, class AB and class B were set only small differences of power added efficiencies were obtained. As high as 58% power added efficiency was obtained if a formal class A operation was set. Because the cut-off regions of high efficient power amplifiers were removed it is believed that the linearity of this kind of amplifier is improved for certain types of modulation techniques which are sensitive to the nonlinearities of the cut-off regions. For heat dissipation a clip-chip technique is used as a heat sink in a coplanar environment

Keywords

UHF power amplifiers; coplanar waveguides; heat sinks; waveguide components; 58 percent; CPW power amplifier; L-band; class A operation; class AB operation; class B operation; clip-chip technique; heat dissipation; heat sink; hybrid integrated amplifier; linearity; power added efficiency; Circuits; Coplanar waveguides; Heat sinks; Heat transfer; High power amplifiers; L-band; Linearity; Operational amplifiers; Power amplifiers; Power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific

Print_ISBN

962-442-117-X

Type

conf

DOI

10.1109/APMC.1997.656419

Filename

656419