The performances of quasi-optics for millimeter-wave imaging system decide the capability of the system, so it is the emphasis of the research of millimeter wave imaging system.
The ray theory of geometric optics was applied to visually investigate the propagation of quasi stationary waves in time mean basic flow and interpret the zonal nonhomogeneity.
Quasi-Optical Mode Converter is mainly adopted vector diffraction theory and Geometry optics theory, and the numerical results of complex reflector are analyzed.