Assigning Boundaries
Assigning Lumped RLC Boundaries
A lumped RLC boundary represents a parallel combination of lumped resistor, inductor, and/or capacitor applied to a surface. Multiple RLC boundaries can be used to model other circuit configurations. For example, a lumped RLC serial circuit connection can be modeled with three connected RLC surfaces: one with only resistance, one with only inductance, and one with only capacitance.
To create a lumped RLC boundary:
1. Select a surface on which to assign the boundary and click HFSS or HFSS-IE>Boundaries>Assign>Lumped RLC to bring up the Lumped RLC Boundary dialog box.
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2. Select Resistance, Inductance, and Capacitance as needed and specify values and units for each selected element. Optionally, you can assign a variable to any of these values.
3. To specify where on the surface the current and voltage will be controlled, define a Current Flow Line. The selection field initially appears as Undefined. Select New Line to define a vector line on the boundary surface.
Note |
HFSS and HFSS-IE assume the lumped RLC is assigned to a rectangular face. If you assign a non-rectangular face, HFSS and HFSS-IE issue a warning, but proceed with the solution. Using a non-rectangular face can result in less accurate representation of the lumped RLC. See the technical notes on RLC boundaries for more information. |
Related Topics
Define a Vector Line
Technical Notes: Lumped RLC Boundaries
Setting Default Boundary/Excitation Base Names.
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