THREE-DIMENSIONAL ELECTROMAGNETIC DIFFRACTION BY A SLOT SYSTEM WITH PARALLEL PLANE DIELECTRIC INTERFACES

An e-cient method is presented for rigorous description of three-dimensional electromagnetic difiraction flelds in slot systems containing several parallel plane interfaces between dielectrics and conductors. For such structures, the method employs the representation of spatial fleld components in terms of two complex scalar functions. They specify two fleld polarizations, which re∞ect and refract on all parallel dielectric interfaces independently, one from the other, which essentially simplify the total solution of difiraction problem. As an example, the application of eigen-function expansions and mode-matching technique solves the speciflc problem of three- dimensional difiraction of a plane electromagnetic wave by a slot in a thin conducting screen located ahead of a half-inflnite dielectric.