This study is about the electromagnetic wave characteristic of rectangular waveguide slot antennas which is coated with arbitrary permittivity, permeability, thickness, and loss. the rectangular waveguide is assumed to be attached to infinite ground plane, and the coated material is assumed to be on the infinite ground plane. The antenna parameters, aperture field distributions, far field radiation patterns are extracted from electromagnetic field analysis. To Analyze the electromagnetic field, the continuity of the magnetic field was forced boundary condition from the waveguide, through dielectric, to free-space. By forcing boun-dary equations, the Green’s function for internal and external are derived; internal Green’s function is derived by using fourier transform, and external Green’s function is derived by Hankel transforms and space-domain basis integrals. Once the integral equations are obtained, the equations are solved by using Method of Moments, pulse expansion modes, and point matching, which gives electromagnetic fields in the slot aperture. After solving the fields, the far field radiation patterns are avail-able. The far field radiation pattern is calculated using the method of stationary phase when integrating the external Green’s functions
This study is about the electromagnetic wave characteristic of rectangular waveguide slot antennas which is coated with arbitrary permittivity, permeability, thickness, and loss. the rectangular waveguide is assumed to be attached to infinite ground plane, and the coated material is assumed to be on the infinite ground plane. The antenna parameters, aperture field distributions, far field radiation patterns are extracted from electromagnetic field analysis. To Analyze the electromagnetic field, the continuity of the magnetic field was forced boundary condition from the waveguide, through dielectric, to free-space. By forcing boun-dary equations, the Green’s function for internal and external are derived; internal Green’s function is derived by using fourier transform, and external Green’s function is derived by Hankel transforms and space-domain basis integrals. Once the integral equations are obtained, the equations are solved by using Method of Moments, pulse expansion modes, and point matching, which gives electromagnetic fields in the slot aperture. After solving the fields, the far field radiation patterns are avail-able. The far field radiation pattern is calculated using the method of stationary phase when integrating the external Green’s functions
