Title :
Memory effects compensation in RF power amplifiers by using envelope injection technique
Author :
Vuolevi, Joel ; Manninen, Jani ; Rahkonen, Timo
Author_Institution :
Dept. of Electr. Eng., Oulu Univ., Finland
Abstract :
This paper addresses the compensation of memory effects in RF power amplifiers (PAs). Such effects impair the cancellation performance of most linearization methods. This study applies the envelope injection technique together with memoryless RF predistortion to a MESFET PA. The results, corroborated by simulations and measurements, show a good improvement in cancellation performance both in the modulation frequency and the amplitude domain. Also, the paper presents new simulation and measurement techniques for characterizing the optimum injection signal
Keywords :
MESFET integrated circuits; UHF power amplifiers; compensation; linearisation techniques; MESFET power amplifiers; RF power amplifiers; amplitude domain; cancellation performance; envelope injection technique; linearization methods; memory effects compensation; memoryless RF predistortion; modulation frequency; optimum injection signal; Frequency modulation; Impedance; Linearity; MESFETs; Measurement techniques; Power amplifiers; Predistortion; Radio frequency; Radiofrequency amplifiers; Voltage;
Conference_Titel :
Radio and Wireless Conference, 2001. RAWCON 2001. IEEE
Conference_Location :
Waltham, MA
Print_ISBN :
0-7803-7189-5
DOI :
10.1109/RAWCON.2001.947645
