DocumentCode
1976721
Title
Importance of Harmonic Terminations in Performances of a Class-C UHF Transistor Power Amplifier
Author
Azizi, Ataollah ; Mazumder, Shamsur R. ; Gardiol, Fred E.
Author_Institution
Chaire d´´Electromagnétisme et d´´Hyperfréquences, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE,16 Chemin de Bellerive, CH-1007 Lausanne Switzerland.
fYear
1979
fDate
17-20 Sept. 1979
Firstpage
633
Lastpage
637
Abstract
The influence of 2nd harmonic on the performances of an UHF class-C transistor power amplifier was determined. A matching circuit was designed, in which the reactive impedance termination presented at the second harmonic can be varied without affecting the impedance presented at the fundamental frequency. The main performance characteristics of the transistor power amplifier (output power, efficiency, intermodulation) were then determined, using two such matching circuits at the input and the output ports of the transistor. A graphical presentation of the results facilitates the choice of the 2nd harmonic terminations which significantly improve the performances of the amplifier.
Keywords
Capacitors; Coupling circuits; Frequency; Impedance measurement; Performance evaluation; Power amplifiers; Power generation; Power measurement; Power system harmonics; Solids;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1979. 9th European
Conference_Location
Brighton, UK
Type
conf
DOI
10.1109/EUMA.1979.332649
Filename
4131423
Link To Document