Title :
Design and optimization tool of a buck derived envelope amplifier for an EER RFPA
Author :
Diaz, David ; Garcia, O. ; Oliver, Jesus A. ; Alou, Pedro ; Cobos, Jose A. ; Patino, Moises ; Ortega, F.J.
Author_Institution :
Centro de Electron. Ind. (CEI), Univ. Politec. de Madrid, Madrid, Spain
Abstract :
In this work it is presented a design tool to estimate the figures of merit of a radiofrequency power amplifier (RFPA) based on the envelope amplifier (EA) design for an EER (Envelope Elimination and Restoration) application. Using as the input data the transfer function of a buck derived converter for an envelope amplifier application, the main figures of merit of the complete amplifier can be obtained. The input data can be defined either analytically, by measurements or by simulation. Different control strategies have been analyzed and compared at the simulation level. Additionally, the non-linearities of the envelope amplifier can be analyzed and quantified. The proposed design tool has been validated experimentally for an OFDM, QAM-based modulations and for a two tone test signal.
Keywords :
OFDM modulation; design engineering; optimisation; power convertors; quadrature amplitude modulation; radiofrequency power amplifiers; EA design; EER RFPA; OFDM; QAM-based modulations; buck derived converter; buck derived envelope amplifier; design tool; envelope amplifier design; envelope elimination and restoration application; radiofrequency power amplifier; transfer function; Bandwidth; Baseband; Frequency modulation; OFDM; Switching frequency; Time-domain analysis; Buck converter; EER; Envelope amplifier; High bandwidth; RFPA;
Conference_Titel :
Control and Modeling for Power Electronics (COMPEL), 2014 IEEE 15th Workshop on
Conference_Location :
Santander
DOI :
10.1109/COMPEL.2014.6877153
