Title :
High-efficiency switched-mode RF power amplifier
Author :
Wagh, Poojan ; Hidya, P.
Author_Institution :
Motorola Labs., Schaumburg, IL, USA
Abstract :
A technique is introduced to generate an amplitude- and phase-modulated RF signal with high linearity and efficiency. The input baseband signals, which are possibly in the Cartesian domain, are mapped to the phase and duty ratio of a PWM signal. The PWM signal is generated at the RF carrier frequency with relatively high efficiency. The PWM signal is easily filtered to give the desired RF signal
Keywords :
PWM power convertors; UHF power amplifiers; amplitude modulation; phase modulation; radiofrequency amplifiers; Cartesian domain; PWM signal filtering; PWM signal generation; RF carrier frequency; amplitude-modulated RF signal; high linearity; high-efficiency switched-mode RF power amplifier; input baseband signal mapping; phase-modulated RF signal; Baseband; High power amplifiers; Linearity; Phase modulation; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Radio frequency; Radiofrequency amplifiers; Signal generators;
Conference_Titel :
Circuits and Systems, 1999. 42nd Midwest Symposium on
Conference_Location :
Las Cruces, NM
Print_ISBN :
0-7803-5491-5
DOI :
10.1109/MWSCAS.1999.867815
