Investigation of power amplifier performance under load mismatch conditions
Paper in proceeding, 2021
The time-varying loading conditions that power amplifiers (PAs) experience in active antenna systems degrade their overall performance. Consequently, the design of linear and highly-efficient PAs under mismatch is more important than ever. In this paper, different common and promising PA architectures, i.e. class-B, balanced, Doherty (DPA) and load-modulated-power-amplifier (LMBA), are analyzed under mismatch. Their sensitivity in terms of linearity, efficiency and output power is compared under a LTE signal excitation. Average drain efficiency (DE), average output power, normalized-mean-square-error (NMSE) as well as maximum output power variations are presented for each architecture as function of the voltage-standing-waveratio (VSWR). Thereby, the most suitable PA architecture to be integrated in active antenna systems may be identified.
efficiency
mismatch
power amplifier
class-B
Doherty
linearity
load modulated balanced amplifier
active antenna system
Author
Roger Argaez Ramirez
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
Jose-Ramon Perez-Cisneros
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
Christian Fager
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics
2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021
41-43 9375507
IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications, PAWR 2021
Virtual, San Diego, USA,
Virtual, San Diego, USA,
Subject Categories (SSIF 2011)
Control Engineering
Signal Processing
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/PAWR51852.2021.9375507