Efficient calculation of permeability and permittivity of coating layer on leaky-wave slot waveguide antenna

Electromagnetic wave characteristic of leaky-wave slot antenna at rectangular waveguide will be discussed in this study. Dielectric coating has been recognized to be useful to control beam pattern of waveguide slot antenna. By introducing dielectric coating to waveguide slot antenna, the sidelobe level and isolation between slot antenna array elements are decreased. In this sense, we will expand this phenomenon on material how permeability and permittivity of coating can affects electromagnetic field.