Increased efficiency in QAM power amplifiers

Increased efficiency in QAM power amplifiers

A dynamic biasing procedure designed to improve the average dc-rf conversion efficiency of power amplifiers employing multi-level modulation schemes such as QAM is investigated. In this technique, the gate bias voltage is adjusted in accordance with the phasor currently being transmitted. Simulation...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Conn, D.R., Hemmers, R.N.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Constellation diagram
Control systems
Multiaccess communication
Power amplifiers
Power generation
Power supplies
Quadrature amplitude modulation
Radiofrequency amplifiers
Time division multiple access
Voltage
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Beschreibung
Zusammenfassung:A dynamic biasing procedure designed to improve the average dc-rf conversion efficiency of power amplifiers employing multi-level modulation schemes such as QAM is investigated. In this technique, the gate bias voltage is adjusted in accordance with the phasor currently being transmitted. Simulations show promising results for a 1 W class-A mode power amplifier. A system to address the distortion issue and dynamic bias control is proposed.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.1998.700694