Wave Equation, Electric is the main feature node for this physics interface. The governing equation can be written in the form

for the time-harmonic and eigenfrequency problems. The wave number of free space k0 is defined as

where c0 is the speed of light in vacuum.

Select an Electric displacement field model — Relative permittivity (the default), Refractive index, Loss tangent, loss angle, Loss tangent, dissipation factor, Dielectric loss, Drude–Lorentz dispersion model, Debye dispersion model, or Wideband Debye model. See the Electric Displacement Field section for the Wave Equation, Electric node in The Electromagnetic Waves, Frequency Domain Interface for all settings.

The default Relative permeability μr, and Electric conductivity σ take values From material. For User defined enter a value or expression in the field.