The Ports Only Component allows you to insert internal ports in your circuit which may be used later in a circuit design program. All of the ports associated with this Component have a common ground and are simultaneously de-embedded during the electromagnetic analysis. There is no limit to the number of ports your Component may have. This Component type is functionally equivalent to using co-calibrated internal ports. For a detailed discussion of co-calibrated ports, see Co-calibrated Internal Ports.
You add a Ports Only component by selecting the command Insert ⇒ Component ⇒ Ports Only. This command opens the Components Properties dialog box.