CAE Software【Femtet】Murata Software Co., Ltd.
A multilayer capacitor placed on a substrate is analyzed.
Microstrip lines connect the capacitor’s electrodes and the ports on the substrate.
S-parameters and the electromagnetic field are solved.
[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.
xx
Mesh tab, Harmonic analysis tab and Open boundary tab are set 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: 1×10^9[Hz] Select “The conductor bodies thicker than the skin depth constitute the boundary condition.” |
|
Harmonic analysis |
Frequency |
Minimum: 1×10^7[Hz] Maximum: 5×10^9[Hz] |
Sweep Type |
Select “Log step” Division number: 100 |
|
Sweep Setting |
Select discrete sweep |
|
Input |
1.0[W] |
|
Open boundary |
Type |
Absorbing boundary |
Order of Absorbing Boundary |
1st degree |
“Fast sweep” is deselected as the frequency is low.
A multilayer capacitor is placed on a substrate. Microstrip lines connect the capacitor’s electrodes and the ports on the substrate.
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
SUBSTRATE |
006_Glass_epoxy * |
1/Solid |
MLCC |
CERAMICS |
2/Solid |
AIR |
000_Air(*) |
3-8/Sheet |
ELECTRODE |
003_Ag * |
* Available from the Material DB
Body Attribute Name |
Tab |
Properties |
ELECTRODE |
Thickness/Width |
Thickness of Sheet Body: 2.0×10^-2[mm] * |
* The unit is [mm] as specified in the analysis condition.
Material Name |
Tab |
Properties |
CERAMICS |
Permittivity |
Relative permittivity: 90 tanD: 2.0×10^-4 |
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
AUTO_PORT_1/Face |
Electric |
I/O Port |
|
AUTO_PORT_2/Face |
Electric |
I/O Port |
|
Outer Boundary Condition |
Electric |
Electric wall |
|
The current density vectors are shown below.
The frequency characteristics of S-parameters are as follows. There is a resonance around 3[GHz].