Can I load the Rectangular Waveguide with a dielectric fill?

Using the Antenna Toolbox rectangular waveguide model, it appears there is no option to use a dielectric filler in the waveguide. Is this correct? Can I select the fill medium?

Answer 1

[Kothuri]

Hi Brian LaRocca,

In Antenna Toolbox, the “rectangular waveguide” model does not directly provide a built-in option to specify a dielectric filler for the waveguide. By default, it assumes the waveguide is air-filled.

You can manually define the dielectric properties and incorporate them into your simulation by following the below steps:

• You can create a custom waveguide geometry that includes a dielectric material. This involves defining the geometry manually and assigning material properties to the interior.
• You can define a dielectric material using the “dielectric” function and specify its properties such as permittivity and loss tangent.

For example:

d = dielectric('Name', 'CustomDielectric', 'EpsilonR', 2.2, 'LossTangent', 0.001);

• Create a custom waveguide using the “antenna.Rectangle” or other geometric primitives and assign the dielectric to the inner volume.

You can refer the below documentation ink for more info on “dielectric” :

https://www.mathworks.com/help/antenna/ref/dielectric.html?&s_tid=srchtitle_support_results_1_dielectric