Uniform Theory of Diffraction (UTD)
The uniform theory of diffraction (UTD) is an asymptotic high-frequency numerical method. The method is typically used for electrically extremely large PEC structures.
The Solver has two UTD
solution methods:
-
- Faceted uniform theory of diffraction (faceted UTD)
- This method is well-suited for antenna placement on electrically large platforms with curved surfaces (such as aircrafts). The method does not support hybridisation with method of moments (MoM). It is a frequency independent solver which uses planar mesh triangles to approximate the structures, including surface curvature. The method takes into account multiple reflections, edge and wedge diffraction and creeping waves.
-
- Uniform theory of diffraction (UTD) with polygons or cylinder
- This method is well-suited for antenna placement of electrically large platforms on flat surfaces (polygons). It is a frequency independent solver which uses polygons to approximate the structures, but it does not consider surface curvature. This method can also be used to solve a single canonical circular cylinder.