Defining Anisotropic Dielectric Loss Tangent Tensors
To represent a dielectric that dissipates the power of a high-frequency electric field, enter a dielectric loss tangent, ᵋ"/ᵋ', property value for the material. The smaller the loss tangent, the less lossy the material.
If the material property is anisotropic, its characteristics are defined by its anisotropy tensor. You must define three diagonals for electric loss tangent. Each diagonal represents a tensor of your model along an axis.
These tensors are relative to the coordinate system specified as the object’s Orientation property. By specifying different orientations, several objects can share the same anisotropic material but be oriented differently.
If electric loss tangent is anisotropic, do the following:
- In the Dielectric Loss Tangent row in the View/Edit Material window, select Anisotropic from the Type drop-down menu.
- Enter the ratio of the imaginary relative permittivity to the real relative permittivity in one direction in the Value box of the T(1,1) row.
- Enter the ratio of the imaginary relative permittivity to the real relative permittivity in the second direction in the Value box of the T(2,2) row.
- Enter the ratio of the imaginary relative permittivity to the real relative permittivity in the third orthogonal direction in the Value box of the T(3,3) row.
Three rows named T(1,1), T(2,2) and T(3,3) are added below the Dielectric Loss Tangent row.
If the electric loss tangent is the same in all directions, use the same values for each direction.
These values can also be defined as variables.
The dielectric loss tangent may vary with frequency. To simulate the variances, define a function for the dielectric loss tangent.
Related Topics
Creating a Relative Coordinate System
Change the Orientation of an object
Defining Anisotropic Relative Permeability Tensors
Defining Anisotropic Relative Permittivity Tensors