A robust discontinuous Galerkin time domain algorithm for penetrable thin layers

<sec>The thin layer problem is common in some engineering cases, such as a coating target or dielectric radome. If the skin depth of medium behind much smaller than scale, transmission line impedance boundary can be used to solve . When both sides are free space greater comparable scale medium, condition not applicable. Such problems need incident and reflected wave data also known penetrable thin-layer problems.</sec><sec>When dealing with problems, we give electromagnetic on sides. In addition, belong multi-scale problems. The EM simulation difficult implement because high resource consumption accurate modeling.</sec><sec>The modeling very expensive algorithm, mesh-size difference between region surrounding ordinary too large, thus seriously affecting quality elements (tetrahedrons). So, it quickly by using time-domain discontinuous Galerkin method even local time steps other optimization methods. To acquire fast solution, approximate describe layer. DGTD has advantage geometric fitting property. model curved, build conformal deal layer, avoiding complicated interpolation correction scheme.</sec><sec>In this work, A robust for layers proposed. our study, find that current excitation scheme prone divergence when large coefficients dealt its robustness poor. problem, use field may encounter multiple layers. presented relevant numerical examples given verify it. results illustrate accuracy effectiveness work calculation complex problems.</sec>