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Title: Efficiency and Linearity Analysis of a Burst Mode RF PA with Direct Filter Connection
Authors: François, Brecht ×
Singerl, Peter
Wiesbauer, Andreas
Reynaert, Patrick #
Issue Date: 1-Jun-2011
Publisher: Cambridge University Press
Series Title: International Journal of Microwave and Wireless Technologies vol:3 issue:3 pages:329-338
Abstract: Burst Mode operation is proposed as an efficiency improving technique for power amplifiers. The core idea is to modulate the amplitude of the envelope signal into a series of square wave pulses such that the width of the signal burst or the total amount of pulses are varied according to the envelope. The phase information is still contained by the timing of the pulses. This work presents the efficiency and linearity analysis of Burst Mode RF PAs. In addition, the efficiency performance is compared when the Burst Mode RF PA is connected to a wideband load or a narrowband filter. It is shown that Burst Mode PAs are more efficient than the conventional Class B PAs. To achieve an even more favorable efficiency, a transmission line is inserted between the output of the switching RF PA and the filter to improve the filters impedance characteristic. Additionally, the efficiency and linearity of the Burst Mode PA with and without transmission line has been studied and simulated thoroughly. To demonstrate the validity of the efficiency formulas and linearity considerations, a PCB-mounted Burst Mode PA using a LDMOS transistor was fabricated. Measurements show a peak efficiency of 78% and 28.8dBm of output power.
ISSN: 1759-0787
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
× corresponding author
# (joint) last author

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