Efficient Calculation of Stabilization Parameters in RF Power Amplifiers
Abstract
This paper proposes an efficient method for the calculation of the stabilization parameters in RF power amplifiers operating in periodic large-signal regimes. Stabilization is achieved by applying the principles of linear control theory for Periodic Linear Time-Varying (PLTV) systems. A numerical method is proposed to obtain the Harmonic Transfer Function that represents the system linearized around the large-signal steady state. Then, a feedback analysis is performed to calculate the closed-loop poles of the PLTV system. The proposed approach is demonstrated with two examples. Firstly, a three-stage amplifier that exhibits a low-frequency oscillation for increasing values of input power is correctly stabilized. Next, the stabilization of an unstable design that exhibits an odd-mode parametric oscillation is presented. The results of the proposed technique are compared to those obtained with the conventional parametric stability simulation. These examples serve to illustrate the capability and efficiency of the proposed approach.
Cite
@article{arxiv.2501.17552,
title = {Efficient Calculation of Stabilization Parameters in RF Power Amplifiers},
author = {Libe Mori and Ibone Lizarraga and Aitziber Anakabe and Juan-Mari Collantes and Vincent Armengaud and Geoffroy Soubercaze-Pun},
journal= {arXiv preprint arXiv:2501.17552},
year = {2025}
}
Comments
12 pages, 18 figures