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Home / Examples / Electromagnetic Analysis [Hertz] / Example 10: Coil Formed in a Substrate
Example 10: Coil Formed in a Substrate
General
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The frequency response of a coil formed in a substrate is solved.
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Unless specified in the list below, the default conditions will be applied.
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Obtain this session's project file. (Right-click and choose 'Save link as')
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Results will vary depending on Femtet version and the PC environment.
Analysis Space
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Item |
Settings |
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Analysis Space |
3D |
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Model Unit |
mm |
Analysis Conditions
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Item |
Settings |
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Solver |
Electromagnetic Analysis [Hertz] |
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Analysis Type |
Harmonic Analysis |
Harmonic Analysis tab and Open Boundary tab are set as follows.
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Tab |
Setting Item |
Settings |
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Mesh Tab |
Element Type |
2nd-order Element |
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Adaptive Meshing |
Select [Apply the adaptive meshing]. |
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Frequency-Dependent Meshing |
Reference frequency: 5x109 [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. |
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Harmonic analysis |
Sweep Type |
Select [Linear Step by Number of Divisions] |
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Sweep Setting |
Minimum: 1×109 [Hz] Maximum: 10x109 [Hz] Division Number: 10 |
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Sweep Setting |
Select Fast Sweep S-Parameter Tolerance: 1x10-3 |
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Input |
1.0 [W] |
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Open Boundary |
Type |
Absorbing Boundary |
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Order of Absorbing Boundary |
1st-order |
Model
A coil (METAL) of a solid body is created inside a substrate (SUB). The ports (PORT1,PORT2) are set on the substrate faces where coil leads come out. Other substrate faces are set with the outer boundary condition to [Electric Wall].
Body Attributes and Materials
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Body Number/Type |
Body Attribute Name |
Material Name |
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0/Solid |
SUB |
006_Glass_epoxy * |
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4/Solid |
METAL |
003_Ag * |
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8/Solid |
METAL |
003_Ag * |
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14/Solid |
METAL |
003_Ag * |
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15/Solid |
METAL |
003_Ag * |
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16/Solid |
METAL |
003_Ag * |
* Available from the material DB
Boundary Conditions
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Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
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PORT1/Face |
Electric |
Port |
Reference Impedance: Select [Specify] and enter 50 ohms. Number of Modes Number of Precalculated Modes: 5 Number of Modes Used in the Actual 3D Analysis: 1 Select Modes: None |
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PORT2/Face |
Electric |
Port |
Same as Above. |
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Outer Boundary Condition |
Electric |
Electric Wall |
N/A |
Results
The frequency response of S11 and S22 is shown below.
