Conference article

An 1 GHz Class E LDMOS Power Amplifier

Andreas Ådahl
Microwave Electronics Laboratory, Chalmers University of Technology, Sweden

Herbert Zirath
Microwave Electronics Laboratory, Chalmers University of Technology, Sweden

Download article

Published in: GigaHertz 2003. Proceedings from the Seventh Symposium

Linköping Electronic Conference Proceedings 8:3, p.

Show more +

Published: 2003-11-06

ISBN:

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

A class E power amplifier working at 1 GHz and with an LDMOS transistor as switching element has been developed. The circuit was implemented with lumped and distributed elements. An output power of 7.9 W at 73 % drain efficiency with a gain of 12.5 dB was obtained at 1 GHz. Both simulations and measurements of the amplifier are presented within this paper. This result represents state of the art in output power and efficiency with a class E amplifier at this frequency.

Keywords

No keywords available

References

[1] G. G Ewing; “High –Efficiency Radio-frequency Power Amplifiers”; Corvallis Oregon; USA; Oregon State University; 1964.

[2] N. O. Sokal and A. D. Sokal; “Class E a new class of highefficiency tuned single-ended switching power amplifiers”; IEEE J. Soild-State Circuits; vol. SC-10; No. 3; pp. 168-176; June 1975.

[3] H. Zirath and D. B. Rutledge; “An LDMOS VHF Class-E power Amplifier Using a High-Q Novel Variable Inductor”; IEEE Transactions on Microwave Theory and Techniques; Vol. 47; No. 12; pp. 2534-2538; December 1999.

[4] A. J. Wilkinsin and J. K. A. Everard; “Transmission-Line Load- Network Topology for Class-E Power Amplifier”; IEEE Transactions on Microwave Theory and Techniques; Vol. 49; No. 6; pp. 1202-1204; June 2001.

[5] S. C. Cripps; “RF Power Amplifiers for Wireless Communications”; Artech House; Boston; 1999.

[6] F. H. Raab; “Idealized Operation of the Class E Tuned Power Amplifier”; IEEE Transactions on Circuits and Systems; Vol. CAS-24; No. 12; pp. 725-735; December 1977.

[7] S. Kee; “The Class E/F Family of Harmonic-Tuned SwitchingPower amplifiers”; Ph.D. Dissertation; Department of Electrical Engineering; Caltech – Pasadena; 2002.

Citations in Crossref