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An 8W GaN-Based H-Bridge Class-D PA for the 900 MHz Band Enabling Ternary Coding
A. Wentzel1, C. Meliani1, G. Fischer2, W. Heinrich1
1 Ferdinand-Braun-Institut, Leibniz-Institut fuer Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
2 Lehrstuhl für Technische Elektronik, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
Published in:
IEEE MTT-S Int. Microw. Symp. Dig., Montreal, Canada, Jun 17-22 (2012).
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Abstract:
This paper presents an H-bridge class-D power
amplifier (PA) for the 900 MHz band based on GaN MMICs. For
a classical BPDS modulated signal, a maximum output power of
34.5 dBm with a drain efficiency of 22% is obtained. Using a
periodic square-wave input signal, the PA achieves a peak output
power of 39 dBm and maximum drain efficiency of 48%.
Investigating different binary and a ternary coding schemes, up
to 30% drain efficiency at 6 dB power back-off is achieved.
Index Terms:
H-bridge, class-D, microwave power amplifiers,
pulse-width modulation, binary, ternary, GaN, MMIC.
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