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HFSS15: Assigning Excitations
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Assigning Excitations
Excitations in HFSS, HFSS Transient, and HFSS-IE are used to specify the sources of electromagnetic fields and charges, currents, or voltages on objects or surfaces in the design. Available excitations differ for each.
• HFSS Excitations
• HFSS-IE Excitations
• HFSS Transient Excitations
After assigning an excitation, you can modify it in some of the following ways, if applicable to the excitation type:
• Change its properties.
• Delete it.
• Reassign it to another surface.
• Reprioritize it.
• Hide it from view
• Show Nets for DC Continuity for 3D Conductors.
• Modify the impedance multiplier.
• Deembed the port.
• Set up Differential Pairs
• For HFSS Transient solutions, render it Active or Passive.
You may assign the following types of excitations to a Driven solution-type HFSS design:
Wave Port | Represents the surface through which a signal enters or exits the geometry, effectively a semi-infinite waveguide attached to the model. |
Lumped Port | Represents an internal surface through which a signal enters or exits the geometry, effectively, a small impedance pole for exiting the structure. |
Terminal... | Represents a terminal. You can assign terminals manually or automatically. |
Floquet Port | Used exclusively with planar-periodic structures. Chief examples are planar phased arrays and frequency selective surfaces when these may be idealized as infinitely large. |
Incident Wave | Represents a propagating wave impacting the geometry. |
Voltage Source | Represents a constant electric field across feed points. |
Current Source | Represents a constant electric current across feed points. |
Magnetic Bias | Used to define the net internal field that biases a saturated ferrite object. |
You can assign the following types of excitation in an HFSS-IE design:
Lumped Port | Represents an internal surface through which a signal enters or exits the geometry. |
Terminal... | Represents a terminal. You can assign terminals manually or automatically. |
Plane Incident Wave | Represents a wave that propagates in one direction and is uniform in the directions perpendicular to its direction of propagation. |
Far Field Wave | A Far field wave is sufficiently far (that is, usually more than a wave length distance) from an antenna to approximate as a plane wave. |
Near Field Wave | A Near Field wave is close enough to the antenna source for near field effects to occur, typically within a wave length. Near field waves include evanescent field behavior. |
You can assign the following types of excitation in an HFSS Transient design. For HFSS Transient designs, the Properties for each excitation includes a Transient tab, enabling you to designate each excitation as Active or Passive.
Wave Port | Represents the surface through which a signal enters or exits the geometry, effectively a semi-infinite waveguide attached to the model. |
Lumped Port | Represents an internal surface through which a signal enters or exits the geometry, effectively, a small impedance pole for exiting the structure. |
Terminal... | Represents a terminal. You can assign terminals manually or automatically. |
Plane Wave | Represents a propagating wave impacting the geometry. |
Voltage Source | Represents a constant electric field across feed points. |
Current Source | Represents a constant electric current across feed points. |
