A STUDY ON DRAIN EFFICIENCY OF EDSM/EPWM TRANSMITTER USING CLASS-E AMPLIFIER

Makoto Taromaru

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.

References

  1. Adachi, T., Iida, M., and Asakura, H. (2002). Transmitting circuit apparatus and method. United States Patent, US 2002/0186440 A1.
  2. Albulet, M. (2001). RF power amplifiers. Noble Publishing, Atlanta.
  3. Choi, J., Yim, J., Yang, J., Kim, J., Cha, J., Kang, D., Kim, D., and Kim, B. (2007). A ?S-digitized polar rf transmitter. IEEE Trans. Microwave Theory Tech., 55(12):2679-2689.
  4. Diet, A., C. Berland, M. V., and Baudoin, G. (2004). EER architecture specifications for ofdm transmitter using a class E amplifier. IEEE Microwave Wireless Compon. Lett., 14:389-391.
  5. Doherty, W. H. (1936). A new high efficiency power amplifier for modulated waves. Proc. IRE, 24(9):1163- 1182.
  6. Dupuy, A. and Wang, Y. E. (2004). High efficiency power transmitter based on envelope delta-sigma modulation (edsm). In Proc. 60th IEEE Vehicular Technology Conf. (VTC2004 Fall), pages 2092-2095.
  7. Kahn, L. R. (1952). Single-sideband transmission by envelope elimination and restoration. Proc. IRE, 40(7):803-806.
  8. Raab, F. H., P. Asbeck, S. C., Kenington, P. B., Popovic, Z. B., Pothecary, N., Sevic, J. F., and Sokal, N. O. (2002). Power amplifier and transmitters for RF and microwave. IEEE Trans. Microwave Theory Tech., 50(3):814-826.
  9. Takahashi, S. and Yamao, Y. (2010). Burst RF signal amplification for EPWM transmitter. IEICE Technical Report, 110(307, MW2010-118):75-80.
  10. Taromaru, M., Ando, N., Kodera, T., and Yano, K. (2007). An EER transmitter architecture with burst-width envelope modulation based on triangle-wave comparison PWM. In Proc. 18th Int. Symp. Personal, Indoor and Mobile Radio Commun. (PIMRC 2007), page 819.
  11. Wang, Y. (2003). An improved kahn transmitter architecture based on delta-sigma modulation. IEEE MTT-S Microwave Symposium Digest 2003, 2:1327-1330.
  12. Yokozawa, S. and Yamao, Y. (2011). Suppression of quantization noise for EPWM transmitter with 2nd-order ?-S modulator. In Proc. 73rd IEEE Vehicular Technology Conf. (VTC2011 Spring).
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Paper Citation


in Harvard Style

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 - Volume 1: ICTRS, ISBN 978-989-8565-28-0, pages 112-117. DOI: 10.5220/0005414801120117


in Bibtex Style

@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 - Volume 1: ICTRS,},
year={2012},
pages={112-117},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005414801120117},
isbn={978-989-8565-28-0},
}


in EndNote Style

TY - CONF
JO - Proceedings of the First International Conference on Telecommunications and Remote Sensing - Volume 1: 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