Modeling and simulation of solid state power amplifier for mobile communication

Abstract

Power amplifier exhibit nonlinearity behavior at microwave frequencies. The effect of nonlinearity appears in the form of adjacent channel interference, gain compression, harmonic distortion, phase distortion, inter-modulation distortion, etc. In this paper, mathematical modeling and simulation with AWR software have carried out on solid state class B power amplifier for feedback, feed forward and digital predistortion techniques. From the result obtained, it is evident that the performance of digital predistortion technique is better in terms of efficiency compared to other techniques as there is no degradation in amplitude with 20 dB reduction in ACPR and 3dB bandwidth of 10 MHz.