FDTD Simulation Optimization for Metal Targets in Rough Media Backgrounds Based on Radar Detection
DOI:
https://doi.org/10.54097/advxk583Keywords:
Finite-difference time domain, adaptive window function, hann window, gaussian window, rough medium interface.Abstract
In the simulation of electromagnetic scattering from a rough medium interface and a metal target by the finite difference time domain method, the traditional fixed-width window function is easy to produce false reflection and attenuate the effective signal when cutting off the boundary. This research utilized a 3GHz Gaussian-modulated sine pulse as the incident wave, a ideal conductor metal cylinder as the target, and a Gaussian-type rough medium interface as the background to verify a window function plan with adaptive width adjustment according to roughness. The truncation effects of Gaussian window, Hanning window and adaptive window are compared and analyzed. The research results show that the adaptive window function can effectively solve the adaptability defect of the traditional fixed window, improve the physical authenticity of the scattering field distribution of metal targets in the rough medium background in FDTD simulation, and provide a better truncation boundary processing scheme for electromagnetic scattering simulation of radar detection scenes.
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