Dielectric Resonator Filter

The following figure shows a coax fed cylindrical dielectric resonator filter. The filter has two cylindrical resonators made of dielectric material of a relative permittivity of 38. Energy is pumped into and out of the filter through two teflon-filled coaxial cables. Taking into account the symmetry of the problem only a quarter of the structure need to be built and modeled.

Resonator 3D model:

The model is created in SolidWorks. Since we have three different materials we have to construct three different parts each part has its own material.

• The first part is the resonator box with a relative permittivity of 1.0.
• The second part is the dielectric discs that have a relative permittivity of 38.0.
• The third part is the Teflon coax with a relative permittivity of 2.02.
• The forth part is the internal conductor with a relative permittivity of 1.0.

All these parts are assembled together to form the dielectric resonator filter model.

Taking into account the symmetry of the model only half of the structure need to be modeled.

HFWorks Results:

• Electric Field Intensity

  

• Magnetic Flux Density

  

• Results Viewer