CST microwave studio 1 Complex permittivity 1 Complex permittivity measurement 1 Dielectric materials 1 Frequency bands 1 Metal-backed methods 1 Microwave frequencies Nondestructive examination 1 Nondestructive methods 1 Permittivity 1 Plate metal 1 Polyvinyl chlorides 1 Relative permittivity 1 Silica 1 Silicon wafers 1 Substrates 1 Thin films 1 Transmission methods 1 Vector network analyzers 1 Washers 1