Assigning Voltage Sources

A voltage source in HFSS can be defined on a surface located anywhere in the 3D problem space. Typically the source is placed on a surface between two conductors such that a user defined total voltage is maintained between the conductors. Voltage source is used when the feed structure is very small compared to the wavelength and a constant electric field may be assumed across the feed points; in this case, HFSS assigns a constant electric field across the gap on which you specified the voltage.

1. Select the object face to which you want to assign the voltage source, and click HFSS>Excitations>Assign>Voltage to display the Voltage Source dialog box.

   

2. Specify the direction of the electric field by drawing a vector.

   When the source is selected, an arrow indicates the direction and a letter v indicates the type of source.

   Note:

   For Transient Solution types, you also designate sources as Active and Passive.

Port sources are created and solved with unit magnitude and 0 degree phase. They can be scaled within the Edit Sources dialog.