Modeling Capability and Effectiveness of Resin Laminated Coatings in Millimeter Wave Radar FDTD Analysis of Automobiles

Automobile millimeter-wave corner radars are mounted behind plastic bumpers, and it is known that bumper shape and color affect millimeter-wave propagation characteristics. Numerical simulation is an effective means of predicting these effects, but explicitly meshing the bumper coating is not practical in terms of modeling man-hours and computational load. We have verified that the Multi-layered Thin Sheet function, which equivalently models the structure of multi-layered coating layers, provides results equivalent to those obtained by explicitly representing multi-layered coating layers while reducing the computational load.