One GHz class E RF power amplifier for a polar transmitter
This paper describes advantages and characteristics of a class E power amplifier when used in a polar transmitter system. Basic principles of class E operation and information about different nonlinearities are given. Also, modifying the transistor model for switch-mode use is discussed briefly. A 1 GHz, 0.5 W class E power amplifier was implemented for a polar transmitter. Performance measurements of a total transmitter system with and without predistortion are presented.
class e power amplifier polar transmitter envelope elimination and restoration (eer)