What is a co-calibrated internal port?

Geometry Elements - Co-calibrated Internal Port Calibration Groups

This feature allows you to create ports that can be used by a circuit simulation tool to connect some type of element into your geometry at a later time outside the Sonnet environment. Co-calibrated internal ports are identified as a calibration group with a common ground node connection and a defined terminal width. When em performs the electromagnetic analysis, the co-calibrated ports within the group are simultaneously de-embedded.

A calibration group can be identified in the project editor by the symbol used to identify the co-calibrated internal ports. The letter(s) identifying the calibration group appears in the port symbol as shown below.

You add a co-calibrated port to a calibration group by selecting the desired calibration group name in the Port Properties dialog box after you assign the co-calibrated port type to the port. You may have an unlimited number of ports in a calibration group. The number of ports in the calibration group should equal the number of signal and ground terminals on the element which you add later.

From within the Port Properties dialog box, you may open the Calibration Group Properties dialog box which allows you to set up your calibration group. Any characteristics of the calibration group is applied to all the co-calibrated ports in the calibration group

*For an explanation of the de-embedding technique used for components, please refer to the article "De-embedding the effect of a local ground plane in electromagnetic analysis" by James C. Rautio, president of Sonnet Software.