Port Normalizing Impedances
The default normalizing impedance for a port is 50 ohms. This is done since 50 ohms is an industry standard; some analysis tools only accept the value of 50 ohms as the normalizing impedance.
In rare cases, you may wish to have S-parameters normalized to some other impedance. The normalizing impedance in Sonnet is represented by the resistance (ohms), reactance (ohms), inductance (nH) and capacitance (pF) as shown in the diagram below.
NOTE: The normalizing impedances are ignored if Y- or Z-parameters are specified for output. Y- and Z-parameters are always normalized to one ohm.
This capability should be used only by the most advanced user. This feature should never be applied to data which is to be used in a standard circuit theory program other than Sonnet’s. Many programs assume S-parameters normalized to exactly 50 ohms; S-parameters normalized to another value would introduce error into the analysis.