Simulation of Space-Time Coding Metasurface By Field-Circuit Co-Simulation

This paper develops a field-circuit co-simulation method to dynamically analyze the space-time coding metasurface arrays. The proposed co-simulation method is to combine discontinuous Galerkin time-domain (DGTD) method based on Maxwell's equations with SPICE solver. The spacetime coding metasurface arrays are decomposed into two subsystems: one is electromagnetic structure part which is modelled by the DGTD method, and the other is circuit part including arbitrarily linear or nonlinear components which is solved by the SPICE solver. The electromagnetic and circuit parts are iteratively solved to achieve the transient response of the space-time coding metasurface arrays. Numerical examples are given to verify the proposed method, demonstrating the feasibility of field-circuit co-simulation for analysis and design of the space-time coding metasurface.