A combined FEM/MoM approach to analyze the plane wave diffractionby arbitrary gratings |
| |
| Authors: | Gedney S.D. Jin fa Lee Mittra R. |
| |
| Affiliation: | Dept. of Electr. Eng., Kentucky Univ., Lexington, KY; |
| |
| Abstract: | The diffraction of TE- and TM-polarized plane waves by planar gratings is numerically analyzed using a combined finite-element-method/method-of-moments (FEM/MoM) algorithm based on the generalized network formulation. The interior region, treated using the FEM, is truncated to a single unit cell with the introduction of an exact periodic boundary condition, which is enforced as a natural boundary condition. Using the FEM to compute the fields within the periodic structure allows gratings of arbitrary cross section and material composition to be efficiently modeled |
| |
| Keywords: | |
|
|
