NDLI: 250W HVHBT Doherty with 57% WCDMA Efficiency Linearized to -55dBc for 2c11 6.5dB PAR

Content Provider	IEEE Xplore Digital Library
Author	Steinbeiser, C. Landon, T. Suckling, C.
Copyright Year	2007
Description	Author affiliation: TriQuint Semicond., Richardson (Steinbeiser, C.; Landon, T.; Suckling, C.)
Abstract	A 2-way symmetrical Doherty amplifier exhibiting 250 W saturated power has been developed using High-Voltage HBT (HVHBT) GaAs technology biased at 28 V on the Collector. Greater than 57% collector efficiency at 50W (47dBm) average output power has been demonstrated while achieving -55dBc linearized ACPR at 5 MHz offset using a 2-carrier-side-by-side WCDMA input signal with 6.5dB peak to average ratio measured at .01% probability on the CCDF. At this condition, the measured overall power-added efficiency is 53%. The HVHBT Doherty exhibits 200W (53dBm) PldBat 70% efficiency with 57% efficiency at 6dB output back-off (OBO) from PldB showing a 25 percentage point improvement over class AB operation.
Starting Page	1
Ending Page	4
File Size	393112
Page Count	4
File Format	PDF
ISBN	9781424410224
DOI	10.1109/CSICS07.2007.16
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Power amplifiers Radiofrequency amplifiers Gallium arsenide Heterojunction bipolar transistors Radio frequency Peak to average power ratio High power amplifiers Power generation Power measurement
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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