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HFSS15: Assigning IE Regions
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For driven modal and driven terminal solutions you can assign objects or sheets as IE Regions to be solved with the IE Solver. This permits a hybrid simulation approach, using the advantages of the FEM and IE solvers.
• 3D objects must be dielectric or conducting based on bulk material conductivity.
• Sheet objects are allowed if they have Perfect E or conducting Finite Conductivity boundary assignment. They cannot be dielectric.
• Dielectric IE Region must either
• be contained within a FEM solve inside object
• have its surface covered by FEM solve inside objects
• Metallic IE Region must either
• (Interior) Be contained within a Dielectric IE Region
• (Exterior) Be outside entire FEM region.
• Faces of two IE Regions may not touch
• Dielectric IE Region may contain implicitly subtracted FEM objects (and imply solver handling like FEBI on their interface)
• Metallic IE Region may touch FEBI surface
Note | For designs like antennas mounted on a platform such as an aircraft or battleship, it is beneficial both in terms of memory and solution time to model antennas using the finite element method, while modeling remaining metallic structures as metallic IE regions. In these cases, a metallic IE region is actually in contact with a FEBI boundary, where appropriate boundary conditions are enforced at the interface between the two solvers. In cases where an IE region is in contact with a FEBI boundary, it is recommended that the FEBI boundary be placed at least a third wavelength away so that the FEM domain can have sufficient space to perform its adaptive mesh refinement more accurately. |
You must select an appropriate object or face in order to enable the menu. From the Project tree with the Boundaries icon selected, click Assign>IE Region or in the Modeler window right-click for the shortcut menu and select IE Region>Assign as IE Region.
If a selected object has already been assigned as IE Region, the menu presents Unassign as IE Region.
To view existing assignments , you can select the Boundaries icon in the Project Tree and right click IE Region>View IE Regions, or in the Modeler window right-click for the shortcut menu and select IE Region>View IE Regions. Select an item to lightlight the object in the Modeler window.
Click Delete IE Region to remove the assignment from the selected object(s). This is equivalent to the Unassign IE Region command.
The Lambda refinement setting in the Solution Setup is ignored in a dielectric IE Region.
For designs with IE Regions, when generating a Report, you can select an IE Surface Fields Report type. When a design contains an IE Region, for post processing, with IE Surface Fields selected as the Field type in the Context area in Signal Calculator, you can select J and Q as Quantities as inputs for the Calculator Stack.
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