COMSOL 6.4 - Relations to Other Port Variables

Relations to Other Port Variables

For Port nodes, the outcoupling variables are related to S-parameter expressions and reflectance/transmittance variables as shown in Table 2-16 below.

Table 2-16: Relations between Port and Outcoupling Variables.
Variable Name	Related Port Variable
ewfd.portM.etaOut	ewfd.Rport_N or ewfd.Tport_N, depending on whether the port with tag portM is on the reflection or transmission side.
ewfd.etaOutMPort_N	ewfd.Rtotal or ewfd.Ttotal, depending on whether the port with port name N is on reflection or transmission side.

In the variables and expressions in Table 2-16, portM is the tag of the port and N is the value of the parameter. The reflection side represents the boundary for the excited port and the transmission side represents the side where there is no excited port.


	For more information about Port variables, see S-Parameters and Ports.