CAE Software【Femtet】Murata Software Co., Ltd.
General
A waveguide filter is loaded with dielectric material.
Its S-parameters are solved.
Unless specified in the list below, the default conditions will be applied.
[How to Reduce the Calculation Time]
Item |
Settings |
Analysis Space |
3D |
Model unit |
mm |
Item |
Settings |
Solvers |
Electromagnetic Analysis [Hertz] |
Analysis Type |
Harmonic analysis |
Options |
Select “Ignore the influence of face/edge electrode thickness” * |
* This is the default setting. There are no face electrodes with this model. Therefore it is irrelevant to select it or not.
The harmonic analysis is set up as follows.
Tab |
Setting Item |
Settings |
Mesh Tab |
Element type |
2nd-order element |
Multigrid/Adaptive Mesh Method |
Select “Use the adaptive mesh method”. |
|
Frequency-Dependent Meshing |
Reference frequency: 2.3×10^9[Hz] Select “The conductor bodies thicker than the skin depth constitute the boundary condition.”
The surface of Metal is treated as the boundary condition having some loss, as Metal is thicker than the skin depth. |
|
Harmonic analysis |
Frequency |
Minimum: 1.5×10^9[Hz] Maximum: 3.0×10^9[Hz] |
Sweep Type |
Select Linear step by division number. Division number: 100 |
|
Sweep Setting |
Select Fast sweep S-parameters variation: 1×10^-3 |
|
Input |
1.0[W] |
The model consists of a solid body for WaveGuide, two solid bodies for Metal, and a solid body for dielectric material DR. Metal and DR are placed in WaveGuide.
Set the I/O port boundary condition on both ends of WaveGuide.
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
WaveGuide |
000_Air(*) |
1/Solid |
Metal |
008_Cu * |
2/Solid |
Metal |
008_Cu * |
3/Solid |
DR |
DRMat |
* Available from the Material DB
The material DRMat is dielectric, and its relative permittivity is set up as follow.
Material Name |
Tab |
Properties |
DRMat |
Permittivity |
Relative permittivity: 2.6 |
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
PORT1/Face |
Electric |
I/O Port |
Reference Impedance: Select Number of Modes Number of precalculated modes: 5 Number of modes used in the actual analysis: 1 Select modes: none |
PORT2/Face |
Electric |
I/O Port |
Reference Impedance: Select Number of Modes Number of precalculated modes: 5 Number of modes used in the actual analysis: 1 Select modes: none |
Outer Boundary Condition |
Electric |
Electric wall |
|
The diagram below shows the I/O characteristics (S-parameters) of the dielectric loaded waveguide filter.
The pass band is around 2.32 GHz.