Numerical Simulation Method of Gyromagnetic Nonlinear Transmission Lines Based on Coupled Solution of Maxwell and LLG Equations

Recently, gyromagnetic nonlinear transmission line (GNLTL) technology has been commonly focused on and developed rapidly as a new type of solid-state wide-spectrum high-power microwave (HPM) generation method. However, because of the lack of an efficient simulation method, its investigation and design basically rely on experiment which increases the cost and complexity. Under this situation, a simulation method based on coupled solutions of Maxwell and Landau-Lifshitz-Gilbert (LLG) equations is proposed. It can realize 2-D/3-D simulation of GNLTLs. The results of this simulation method agree well with COMSOL Multiphysics software under an uncommonly weakly nonlinear situation. This verified the validity of this method to some extent. Finally, experiments are conducted to be directly contrasted with and further verify the simulation method.

Automated summary

Recently, gyromagnetic nonlinear transmission line (GNLTL) technology has gained significant attention as a new solid-state high-power microwave (HPM) generation method. However, the lack of an efficient simulation method has necessitated reliance on costly and complex experiments for investigation and design. To address this, a simulation method based on coupled solutions of Maxwell and Landau-Lifshitz-Gilbert (LLG) equations is proposed, enabling 2-D/3-D simulation of GNLTLs. The validity of this method is verified to a certain extent by demonstrating good agreement with COMSOL Multiphysics software in a weakly nonlinear situation. Additionally, experiments are conducted to directly contrast and further verify the simulation method.