Title :
Performance estimation of fully digital polar modulation driving a 2 GHz switch-mode power amplifier
Author :
Ostrovskyy, P. ; Scheytt, J. Christoph ; Sadeghfam, Arash ; Heuermann, Holger
Author_Institution :
IHP, Frankfurt (Oder), Germany
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
This paper presents a fully digital transmitter architecture based on a digital polar modulator (DPM) and switch-mode power amplifier (SMPA). A simple method for comparison and estimation of different digital modulation techniques for SMPA is described. An estimation of the proposed digital polar modulator properties was done by means of a 2.1..2.2 GHz class-F power amplifier. For a CDMA signal with 9.5 dB peak-to-average power ratio (PAPR), the class-F based amplifier module driven by DPM pulse train shows more than 1 W output power and more than 10 % of drain efficiency.
Keywords :
UHF power amplifiers; modulators; CDMA signal; DPM pulse train; PAPR; SMPA; class-F based amplifier module; frequency 2 GHz; fully digital polar modulation technique; fully digital transmitter architecture; peak-to-average power ratio; switch-mode power amplifier; Frequency modulation; Generators; Power amplifiers; Power generation; Power measurement; Switches; digital-to-RF converter; polar transmitter; sigma-delta modulation; switch-mode amplifier;
Conference_Titel :
Microwave Conference (EuMC), 2012 42nd European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2215-7
Electronic_ISBN :
978-2-87487-026-2
