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Home / Examples / Electromagnetic Analysis [Hertz] / Example 20: Differential Lines without Connector
Example 20: Differential Lines without Connector
General
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A balanced line formed on a dielectric substrate is characterized.
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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 |
The harmonic analysis is set up as follows.
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Tab |
Setting Item |
Settings |
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Mesh Tab |
Frequency-Dependent Meshing |
Reference Frequency: 1x109 [Hz] Select [The conductor bodies thicker than the skin depth constitute the boundary condition]. |
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Harmonic analysis |
Sweep Type |
Select [Linear Step by Number of Divisions] |
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Sweep Setting |
Minimum: 0.15×109 [Hz] Maximum: 1.5x109 [Hz] Division number: 5 |
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Sweep Setting |
Select discrete sweep |
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Input |
1.0 [W] |
Model
Two microstrip lines are placed in parallel. Port 1 and Port 2 are on the same face.
Create a face which includes ports, and set the "port" there.
This face doesn't need to have either the material name or the body attribute name, as the purpose of it is only to create the ports.
Electric wall surrounds the model. The boundaries of Port1 and Port2 are treated as electric wall too.
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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1/Solid |
Electrode |
008_Cu * |
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6/Solid |
Electrode |
008_Cu * |
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7/Solid |
AIR |
000_Air(*) |
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8/SheetBody |
Imprinting body |
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9/SheetBody |
Imprinting body |
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10/SheetBody |
Imprinting body |
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11/SheetBody |
Imprinting body |
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* Available from the material DB
Boundary Conditions
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Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
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Port_001/Face Port_002/Face Port_003/Face Port_004/Face
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Electric |
Port |
Reference Impedance: 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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Outer Boundary Condition |
Electric |
Electric Wall |
Set on the [Open Boundary] tab of [Analysis Condition] |
Results
