ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
Reflection and transmission of electromagnetic waves at boundaries between dielectric media, and reflection at highly conducting boundaries have been treated extensively in the literature for years. Usually approximations have been made to fit the special case under discussion. When dealing with good dielectrics, the conductivity is usually neglected and for highly conducting materials the dielectric constant is neglected. Almost always, the permeability is considered to be equal to that of free space. Between these limiting cases, there are a host of materials in which all three constitutive parameters, permeability, permittivity, and conductivity should be considered.