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Author: Makoto Taromaru

Affiliation: Faculty of Engineering, Fukuoka University, Japan

Keyword(s): drain efficiency, power amplifiers, amplitude modulation, EER, pulse width modulation, delta-sigma modulation.

Abstract: Drain efficiency of EPWM (envelope pulse width modulation) transmitter composed of a class-E amplifier is evaluated by circuit simulation, and the pulse modulation method to the constant envelope RF signal by PWM pulses is studied. The class-E amplifier is designed as normal for continuous wave (CW) and constant envelope signals. Each transistor is modeled with an ideal switch and an on-resistor, where the drain-source capacitance is modeled as a linear one together with the shunt capacitor. Simulation results show that the conventional PWM switching method gating the input RF signal produces unnecessary transient responses making the drain voltage rise and the output signal distorted; the efficiency is degraded. Another method that gates the DC supply voltage by the PWM pulses works as expected and intended, and the result shows the drain efficiency is as high as that of a class-E amplifier driven with a CW signal.

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Paper citation in several formats:
Taromaru, M. (2012). A STUDY ON DRAIN EFFICIENCY OF EDSM/EPWM TRANSMITTER USING CLASS-E AMPLIFIER. In Proceedings of the First International Conference on Telecommunications and Remote Sensing - ICTRS; ISBN 978-989-8565-28-0, SciTePress, pages 112-117. DOI: 10.5220/0005414801120117

@conference{ictrs12,
author={Makoto Taromaru.},
title={A STUDY ON DRAIN EFFICIENCY OF EDSM/EPWM TRANSMITTER USING CLASS-E AMPLIFIER},
booktitle={Proceedings of the First International Conference on Telecommunications and Remote Sensing - ICTRS},
year={2012},
pages={112-117},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005414801120117},
isbn={978-989-8565-28-0},
}

TY - CONF

JO - Proceedings of the First International Conference on Telecommunications and Remote Sensing - ICTRS
TI - A STUDY ON DRAIN EFFICIENCY OF EDSM/EPWM TRANSMITTER USING CLASS-E AMPLIFIER
SN - 978-989-8565-28-0
AU - Taromaru, M.
PY - 2012
SP - 112
EP - 117
DO - 10.5220/0005414801120117
PB - SciTePress