Defining a Dielectric Medium

Define a lossy frequency-independent dielectric with a relative permittivity ( ${\epsilon }_{\text{r}}$ ) = 5.6 and a dielectric loss tangent ( $\tan \delta$ ) = 0.0041 to be used as the patch substrate.

1. Open the Create Dielectric Medium dialog using one of the following workflows:
   • On the Construct tab, in the Define group, click the  Media icon. From the drop-down list, click the  Dielectric icon.
   • On the model tree, a right-click context menu is available on Media. From the list, click Dielectric Medium.

Two variables (ceramic_epsR and ceramic_tanD) were added to the model to define the dielectric.

2. Set the Relative permittivity ( ${\epsilon }_{\text{r}}$ ) to ceramic_epsR.
3. Set the Dielectric loss tangent ( $\tan \delta$ ) to ceramic_tanD.

   
   

   

   
   Figure 1. The Create Dielectric Medium dialog.

4. Set the Label to Ceramic.
5. Click Create to create the dielectric and to close the dialog.

Note: In the model tree, the defined dielectric is displayed under Dielectric. CADFEKO assigns a colour to each medium randomly but the colour may be changed by using the Change Display Colour right-click context menu option.