Advertisement

Switched Mode Transmitter Architectures

  • Henrik SjölandEmail author
  • Carl Bryant
  • Vandana Bassoo
  • Mike Faulkner
Chapter

Abstract

With the introduction of new cellular phone standards with increased modulation complexity and signal bandwidth, the design of efficient transmitters will be a major challenge. With this in mind a number of switched mode transmitter architectures are described, both polar and Cartesian ones. The most promising candidates use a combination of supply voltage modulation and other techniques, such as radio frequency pulse width modulation (RF PWM) or polar delta sigma modulation. This takes advantage of the high efficiency of supply voltage modulation combined with the high speed of the other techniques. Since the architectures are polar, however, significant bandwidth expansion occurs, increasing the requirements on the baseband circuits. Also for Cartesian architectures supply voltage modulation can be used to increase the efficiency, for instance in a double LINC architecture.

Keywords

Duty Cycle Supply Voltage Power Amplifier Pulse Width Modulate Total Harmonic Distortion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    E. Dahlman et al., “3G Evolution: HSPA and LTE for Mobile Broadband”, 2nd edition, Academic Press, 2008.Google Scholar
  2. 2.
    S. Cripps, “RF Power Amplifiers for Wireless Communications”, Artech House, 1999.Google Scholar
  3. 3.
    J. Groe, “Polar Transmitters for Wireless Communications”, IEEE Communications Magazine, pp. 58–63, September 2007.Google Scholar
  4. 4.
    J.F. Bercher and C. Berland, “Envelope/phase Delays Correction in an EER Radio Architecture”, In Proceedings ICECS, December 2006.Google Scholar
  5. 5.
    E. Cijvat and H. Sjöland, “Two 130 nm CMOS Class-D RF Power Amplifiers Suitable for Polar Transmitter Architectures”, In Proceedings of International Conference on Solid-State and Integrated-Circuit Technology (ICSICT), pp. 1380–1383, October 2008.Google Scholar
  6. 6.
    W-Y Chu, et al., “A 10 MHz Bandwidth, 2 mV Ripple PA Regulator for WCDMA Transmitters”, IEEE Journal of Solid-State Circuits, pp. 2809–2819, Vol. 43, No. 12, December 2008.CrossRefGoogle Scholar
  7. 7.
    P. Dent, “Linear Amplification Systems and Methods Using More than Two Constant Length Vectors”, US 6,311,046 B1, October 30, 2001.Google Scholar
  8. 8.
    H. Sjöland, “Double LINC Switched Mode Transmitter”, US 12/139813.Google Scholar
  9. 9.
    C. Bryant, “Quadrature Pulse-Width Modulation Methods and Apparatus”, GB0822489.1Google Scholar
  10. 10.
    E. Cijvat et al., “A Comparison of Polar Transmitter Architectures Using a GaN HEMT Power Amplifier”, In Proceedings IEEE International Conference on Electronics, Circuits and Systems, pp. 1075–1078, October 2008.Google Scholar
  11. 11.
    M. Nielsen and T. Larsen, “A 2-GHz GaAs HBT RF Pulsewidth Modulator”, IEEE Transactions on Microwave Theory and Techniques, pp. 300–304, Vol. 56, No. 2, February 2008.CrossRefGoogle Scholar
  12. 12.
    H. Sjöland, “Switched Mode Power Amplification”, WO2008002225 (A1), January 3, 2008.Google Scholar
  13. 13.
    R. Schreier and G.C. Temes, “Understanding Delta-Sigma Data Converters”, Wiley-IEEE, 2004.Google Scholar
  14. 14.
    J. Keyser, et al., “Digital Generation of RF Signals for Wireless Communications with Band-pass Delta-sigma Modulation” International Microwave Symposium Digestive, Vol. 3, pp. 2127–2130, June 2001.Google Scholar
  15. 15.
    P. Wagh and P. Midya, “High Efficiency Switched – Mode RF Power Amplifier”, 42nd Midwest Symposium on Circuits and Systems, pp. 1044–1047. Vol. 2, 1999.Google Scholar
  16. 16.
    V. Bassoo and M. Faulkner, “Sigma-Delta Digital Drive Signals for Switch-Mode Power Amplifiers”, IET Electronic Letters, Vol. 44, No. 22, October 2008.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Henrik Sjöland
    • 1
    • 2
    Email author
  • Carl Bryant
    • 1
  • Vandana Bassoo
    • 3
  • Mike Faulkner
    • 3
  1. 1.Lund UniversityLundSweden
  2. 2.EricssonLundSweden
  3. 3.Victoria UniversityMelbourneAustralia

Personalised recommendations