Materials in Analyst are defined in terms of the following four quantities:
relative permittivity, εr,
relative permeability, μr,
either the electric conductivity, σ, or the electric loss tangent, tan(δ),
either the magnetic conductivity, σ*, or the magnetic loss tangent, tan(δ*).
Any of these parameters may be isotropic or symmetric tensor materials. By specifying these parameters, you define the material properties in the Maxwell equations according to:
Here, ε0 = 8.854 x 10-12 F/m is the free space permittivity and μ0 = 4π x 10-7 H/m is the free space permeability. ρ is the electric charge density determined from the source conditions in your simulation.
When you create a new material or modify the properties of an existing material, you can specify either σ or tan(δ), but not both; this is also true for σ* and tan(δ*). Written in terms of loss tangents, the two curl equations become: