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A Novel Time-Domain Scheme for Calculating the Wideband Transmission Characteristics of Dielectric-Background Multilayer Metal Meshes
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DOI：10.1109/LAWP.2026.3655415.png)
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Abstract
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Aiming at the electromagnetic computation problem of multilayer metal meshes due to the multiscale structure and the existing dispersion model's difficulty in accurately fitting the transmittance characteristics of dielectric-background multilayer metal meshes (DBMMM) in a wide frequency range, a novel time-domain scheme utilizing a linear loss dispersion model is proposed for the transmittance characteristics of DBMMM. The fine structure is eliminated by replacing the composite structure of DBMMM with a single-layer dispersive medium, then a coarser grid can be employed to calculate the transmission characteristics of complex structures containing fine metal mesh structures. Compared with existing dispersion models, the proposed linear loss dispersion model exhibits enhanced adaptability. Also, compared with existing equivalent methods, the presented algorithm can be applied to a wider frequency range and has higher calculation accuracy. Compared with the traditional finite-difference time-domain method, the proposed method has the speedup of 117.58 and the memory occupation of 11.19%.
Keywords:
Dispersion model
finite-difference time domain (FDTD)
genetic algorithm (GA)
linear loss model
multilayer metal meshes
time-domain computational scheme
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