Details zur Publikation
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| Titel | A Novel High Efficiency Power Amplifier Concept for GSM Handsets |
| Titel (Englisch) | A Novel High Efficiency Power Amplifier Concept for GSM Handsets |
| Autor | Koller, Rainer; Stelzer, Andreas; Abt, Karl-Heinz; Weigel, Robert; |
| Institution | JKU FoDok |
| Kurzfassung (Englisch) | The demand for ever increasing talking times and reduced weight of modern GSM handsets can only be achieved by a significant reduction of the power consumption of the cellular handset, mostly the power amplifier (PA). The constant envelope modulation scheme of the GSM system allows the design of high efficiency power amplifiers, such as switching amplifiers. Among them, the Class-E amplifier concept is best suited, because it allows about 80% efficiency, while maintaining an excellent output spectrum and reasonable gain. Another advantage is the possibility to an a-priori design and characterization of the amplifier stage by simulation. This fact is demonstrated in this paper, by comparing simulation and measurement results of a 45-MHz Class-E amplifier as a 1:20 frequency scaled model of a 900-MHz GSM power amplifier. The excellent match between theory and measurement allows a good prediction of the final Class-E amplifier characteristics by simulation.The demand for ever increasing talking times and reduced weight of modern GSM handsets can only be achieved by a significant reduction of the power consumption of the cellular handset, mostly the power amplifier (PA). The constant envelope modulation scheme of the GSM system allows the design of high efficiency power amplifiers, such as switching amplifiers. Among them, the Class-E amplifier concept is best suited, because it allows about 80% efficiency, while maintaining an excellent output spectrum and reasonable gain. Another advantage is the possibility to an a-priori design and characterization of the amplifier stage by simulation. This fact is demonstrated in this paper, by comparing simulation and measurement results of a 45-MHz Class-E amplifier as a 1:20 frequency scaled model of a 900-MHz GSM power amplifier. The excellent match between theory and measurement allows a good prediction of the final Class-E amplifier characteristics by simulation. |
| Erscheinungsjahr | 2001 |
| Zitat (Deutsch) | Rainer Koller, Andreas Stelzer, Karl-Heinz Abt, Robert Weigel,
"A Novel High Efficiency Power Amplifier Concept for GSM Handsets"
, in Proc. 2001 EuMC, 9-2001 |
| Zitat (Englisch) | Rainer Koller, Andreas Stelzer, Karl-Heinz Abt, Robert Weigel,
""
, in Proc. 2001 EuMC, 9-2001 |
| Link |
http://fodok.jku.at/fodok/publikation.xsql?PUB_ID=12714... |
| Datenquelle | Johannes Kepler Universität Linz |
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