HFSS15: Voltage Sources

A voltage source in HFSS can be defined on surface located anywhere in the 3D problem space, but it typically makes sense to place the source on a surface between two conductors such that a user defined total voltage is maintained between the conductors.

A voltage source is implemented in HFSS by forcing the electric field on the source surface to maintain a user-specified voltage drop along the voltage line. You can specify any surface as the source surface, but the prescribed field pattern is best suited for rectangular planar surfaces or non-planar surfaces obtained from the side wall surface of cylinders with uniform cross sections such as a circular cylinder. The enforced electric field pattern is obtained by projecting a static uniform field onto the source surface with the electric field in the direction of the user defined voltage line.

A voltage source cannot be used to extract S-parameters. For S-parameter computations of an HFSS design involving a mixture of ports and voltage sources, all the voltage sources are shorted by treating the voltage source surface as a perfect electric conductor.