CAE Software【Femtet】Murata Software Co., Ltd.
Example10 Coil Formed in a Substrate
General
-
The characteristics of a coil formed in a substrate are analyzed.
-
Unless specified in the list below, the default conditions will be applied.
-
[How to Reduce the Calculation Time]
Analysis Space
|
Item |
Settings |
|
Analysis Space |
3D |
|
Model unit |
mm |
Analysis Conditions
|
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: 5×10^9[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: 1×10^9[Hz] Maximum: 10×10^9[Hz] |
|
Sweep Type |
Select Linear step Division number: 10 |
|
|
Sweep Setting |
Select Fast sweep S-parameters variation: 1×10^-3 |
|
|
Input |
1.0[W] |
|
|
Open boundary |
Type |
Absorbing boundary |
|
Order of Absorbing Boundary |
1st degree |
Model
A coil (METAL) is formed in a substrate (SUB). I/O ports (PORT1,PORT2) are set on the faces where coil leads come out. Other substrate surfaces are set with the “electric wall” boundary condition.
Body Attributes and Materials
|
Body Number/Type |
Body Attribute Name |
Material Name |
|
0/Solid |
SUB |
006_Glass_epoxy * |
|
4/Solid |
METAL |
003_Ag * |
|
8/Solid |
METAL |
003_Ag * |
|
14/Solid |
METAL |
003_Ag * |
|
15/Solid |
METAL |
003_Ag * |
|
16/Solid |
METAL |
003_Ag * |
* Available from the Material DB
Boundary Conditions
|
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
|
PORT1/Face |
Electric |
I/O Port |
Reference Impedance: Select “Specify” and enter 50 ohms. 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 |
Same as above. |
|
Outer Boundary Condition |
Electric |
Electric wall |
N/A |
Results
The frequency characteristics of S11 and S22 are shown below.
