Article | GigaHertz 2003. Proceedings from the Seventh Symposium | An 1 GHz Class E LDMOS Power Amplifier

Title:
An 1 GHz Class E LDMOS Power Amplifier
Author:
Andreas Ådahl: Microwave Electronics Laboratory, Chalmers University of Technology, Sweden Herbert Zirath: Microwave Electronics Laboratory, Chalmers University of Technology, Sweden
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Year:
2003
Conference:
GigaHertz 2003. Proceedings from the Seventh Symposium
Issue:
008
Article no.:
003
No. of pages:
4
Publication type:
Abstract and Fulltext
Published:
2003-11-06
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


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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.

GigaHertz 2003. Proceedings from the Seventh Symposium

Author:
Andreas Ådahl, Herbert Zirath
Title:
An 1 GHz Class E LDMOS Power Amplifier
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.

GigaHertz 2003. Proceedings from the Seventh Symposium

Author:
Andreas Ådahl, Herbert Zirath
Title:
An 1 GHz Class E LDMOS Power Amplifier
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