Application of multibranch linear-linear basis function for multiscale dielectric targets simulation

Here, the multibranch linear-linear basis function (MB-LL) is applied to the Poggio-Miller-Chang-Harrington-Wu-Tsai equation for calculating the scattering problem of multi-scale dielectric targets. The MB-LL basis function replaces the positive and negative triangles of the traditional linear-linear basis function (LL) with multiple branches, so it can be used at the junction of the meshes of different size. By using the MB-LL basis function, we can easily divide the calculation region into several non-overlapping regions, which is very suitable for the simulation of multiscale targets. At the same time, the MB-LL basis function inherits the properties of the LL basis function, which is more accurate than the multibranch Rao-Wilton-Glisson (MB-RWG) basis function. Numerical examples demonstrate the advantages of the proposed method. The novel multibranch linear-linear basis function (MB-LL) is applied to the Poggio-Miller-Chang-Harrington-Wu-Tsai equation for calculating the scattering problem of multiscale dielectric targets for improving the accuracy. image