NDLI: A voltage-mode class-s power amplifier for the 450MHz band

Content Provider	IEEE Xplore Digital Library
Author	Wentzel, A. Meliani, C. Heinrich, W.
Copyright Year	2010
Description	Author affiliation: Ferdinand-Braun-Institut (FBH), 12489 Berlin / Germany (Wentzel, A.; Meliani, C.; Heinrich, W.)
Abstract	This paper reports on a novel voltage-mode class-S power amplifier for the 450 MHz band, based on GaN-HEMT MMICs. It achieves a peak output power of 3.4 W for a single tone at 400 MHz, encoded in standard band-pass delta-sigma modulation with 1.6 Gbps sampling frequency. The corresponding efficiency is 38%, peaking at 52% for 0.5 W output power. In order to demonstrate the influence of coding efficiency, additional measurements using a periodic square-wave signal were performed (class-D operation), which yield a maximum output power of 6.5 W with 64% efficiency. To the authors knowledge, these are the best results in this frequency range achieved so far with the voltage-mode class-S configuration.
Starting Page	640
Ending Page	643
File Size	752105
Page Count	4
File Format	PDF
ISBN	9781424472321
e-ISBN	9782874870163
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-28
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	EUROPEAN MICROWAVE ASSOC
Subject Keyword	Power amplifiers Switches Band pass filters Gallium nitride Power generation MMICs Microwave amplifiers band-pass delta-sigma modulation power amplifier class-S voltage-mode GaN HEMT switch-mode
Content Type	Text
Resource Type	Article

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A voltage-mode class-s power amplifier for the 450MHz band