Gap(coax) Ports

The Gap(coax) lumped port is commonly used to excite terminals at package interfaces. Common applications include excitation of vias, bondwires, and solderballs. Ports create circular geometry, the 2D cross-section for which should resemble a coaxial conductor.

The following pre-simulation validation checks apply:

• Port geometry does not intersect other port geometry
• Circumference is wholly contained by conductor

Note that, unlike other port types, terminal identification is performed post-mesh by the solver.

Terminal Assignments in Gap(coax) Ports

Because the terminal geometry of Gap(coax) ports often originates from unrelated and/or 3D structures, their identification and most validation checks are deferred to post-mesh. The port-solver searches for a valid terminal that is interior to the port-face in order to generate a chosen field distribution. Various checks are included, and accurate messaging is provided. If applicable, pay particular attention to the LayerAlignment property, since the port face must contain the terminal geometry.