Title :
On high linearity ? high efficiency RF amplifier design
Author :
Bruno, M. ; Cousseau, J. ; Ghadam, A. Shahed Hagh ; Valkama, M.
Author_Institution :
CONICET - Dept. of Electr. & Comput. Eng., Univ. Nac. del Sur Bahia Blanca, Bahia Blanca, Argentina
Abstract :
We present an RF-DSP co-design of a high power radio frequency (RF) power amplifier (PA) based on LDMOS technology, addressed to WiMAX base-station applications. The design increases the overall efficiency of the PA stage by means of mixed design using simulation tools that include: two tone harmonic-balance, load and source pull and the use of a digital pre-distortion (DPD) algorithm in ADS envelope Ptolemy/Matlab co-simulation. The PA was realized with MRF6S23100HR transistors biased in Class AB, using a push-pull configuration. The baluns transformers, bias and matching networks are designed using micro-strip techniques. To fulfill the standard specifications, we show that with a basic pre-distortion scheme the whole design meets the spectral mask requirements in addition to allow a considerable increase in efficiency.
Keywords :
MOS integrated circuits; WiMax; baluns; digital signal processing chips; microstrip lines; power amplifiers; radiofrequency amplifiers; radiofrequency integrated circuits; ADS envelope Ptolemy/Matlab cosimulation; DPD algorithm; LDMOS technology; MRF6S23100HR transistors; RF-DSP power amplifier design; WiMAX base station applications; baluns transformers; class AB push-pull amplifier; digital predistortion algorithm; matching networks; microstrip technique; simulation tools; tone harmonic balance; Baseband; Computational modeling; Educational institutions; Laboratories; Linearity; Load modeling; Mathematical model; Efficiency; LDMOS; RF-DSP co-design; bias; class AB; linearity; linearization; push-pull;
Conference_Titel :
Argentine School of Micro-Nanoelectronics Technology and Applications (EAMTA), 2010
Conference_Location :
Montevideo
Print_ISBN :
978-1-4244-6747-1
Electronic_ISBN :
978-987-1620-14-2
