Mesh Morphing-Embedded Space Mapping Optimization for Waveguide Components With Arc Structures

Coarse- and fine-mesh space mapping (SM) using the mesh morphing technique has proved its efficiency in designing waveguide components with rectangle structures. This letter proposes an improved mesh morphing technique for more practically used waveguide components with arc structures. Two constraint points are defined for an arc with any angle to guide the morphing of curve nodes with respect to the change of geometrical parameters. New formulations are proposed for calculating the 3-D coordinates of morphed mesh nodes on arcs. With the new formulations, mesh elements around arc structures can morph smoothly, speeding up the overall SM process. The proposed technique is demonstrated by two waveguide examples.