This contribution presents a creative circuit level solution to improve the efficiency versus frequency response of the Doherty amplifier. The proposed approach is compared with the conventional one and experimentally validated through a practical prototype realization based on GaN-HEMTs. Continuous wave measurements have shown a 65%-51% efficiency at about 42-36.5-dBm output power from 1.95-GHz to 2.25-GHz. When tested with a mobile WiMAX signal with 5MHz bandwidth and 9.3-dB Peak-to-Average Power Ratio (PAPR), the Doherty amplifier achieved an average efficiency around 50% with an Adjacent Channel Power Ratio (ACPR) lower than -38-dBc. Similar performances have been registered using a signal with 48-MHz bandwidth and 10.3-dB PAPR.

Giofre', R., Piazzon, L., Colantonio, P., & Giannini, F. (2013). A Doherty amplifier with maximally flat efficiency in the bandwidth. In Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International (pp.1-3) [10.1109/MWSYM.2013.6697335].

A Doherty amplifier with maximally flat efficiency in the bandwidth

GIOFRE', ROCCO;PIAZZON, LUCA;COLANTONIO, PAOLO;GIANNINI, FRANCO
2013

Abstract

This contribution presents a creative circuit level solution to improve the efficiency versus frequency response of the Doherty amplifier. The proposed approach is compared with the conventional one and experimentally validated through a practical prototype realization based on GaN-HEMTs. Continuous wave measurements have shown a 65%-51% efficiency at about 42-36.5-dBm output power from 1.95-GHz to 2.25-GHz. When tested with a mobile WiMAX signal with 5MHz bandwidth and 9.3-dB Peak-to-Average Power Ratio (PAPR), the Doherty amplifier achieved an average efficiency around 50% with an Adjacent Channel Power Ratio (ACPR) lower than -38-dBc. Similar performances have been registered using a signal with 48-MHz bandwidth and 10.3-dB PAPR.
Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International
Seattle, WA
2013
Rilevanza internazionale
contributo
Settore ING-INF/01 - Elettronica
English
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6697335&tag=1
Intervento a convegno
Giofre', R., Piazzon, L., Colantonio, P., & Giannini, F. (2013). A Doherty amplifier with maximally flat efficiency in the bandwidth. In Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International (pp.1-3) [10.1109/MWSYM.2013.6697335].
Giofre', R; Piazzon, L; Colantonio, P; Giannini, F
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/83527
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