Comparative efficiency analysis of RF power amplifiers with fixed bias and envelope tracking bias
Envelope tracking; Envelope tracking bias; ETPA; Fixed bias; Mobile communication; RF power amplifier; Wireless communication
RF power amplifier (RF PA) finds its application in almost all the areas of electronics, mobile communication being identified as a major area. The paper performs a comparative efficiency analysis of RF power amplifiers operating with a fixed bias and an envelope tracking bias. Simulations are performed using Keysight advanced design system (ADS) tool. A class a RF PA operating at a 12 dB gain is fixed for the work. 16 QAM LTE signal operating at 5 MHz input frequency, with a peak to average power ratio (PAPR) of 6.0 dB is used as input signal. An envelope simulation at 2.5 GHz is performed on the RF power amplifier. Simulation result shows an improvement of 12% in power added efficiency (PAE) at 6 dB back-off and 6.422% in mean PAE while using envelope tracking power amplifiers, compared to RF PA with fixed supply. Envelope tracking power amplifiers reduced AM/AM distortions also by a factor of 0.248. The results obtained are much better than that obtained using a conventional RF PA with fixed bias. RF PA being the most power dissipative block in a mobile handset, improving its efficiency contributes directly to a great improvement in the battery lifetime of mobile phones. The major challenges faced by envelope tracking PA (ETPA) designers in achieving this efficiency improvement is also delineated in the paper. 2024 Institute of Advanced Engineering and Science. All rights reserved.
Babu A.; Shivaleelavathi B.G.; Yatnalli V.
Indonesian Journal of Electrical Engineering and Computer Science, Vol-36, No. 2, pp. 808-816.
Institute of Advanced Engineering and Science
https://doi.org/10.11591/ijeecs.v36.i2.pp808-816 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202856207&doi=10.11591%2fijeecs.v36.i2.pp808-816&partnerID=40&md5=2d3ef64eff9bd9f3114236017bbf5148
Babu A., Department of Electronics and Communication Engineering, CHRIST University, Bengaluru, India; Shivaleelavathi B.G., Department of Electronics and Communication Engineering, JSS Academy of Technical Education, Bengaluru, India; Yatnalli V., Department of Electronics and Communication Engineering, JSS Academy of Technical Education, Bengaluru, India