Sonnet User's Guide - Sonnet Software

Chapter 5 Ports
If you wish to change the impedance of a given port, and wish to see the impedance
values of other ports while doing so, proceed as follows:
1 Select Circuit ⇒ Ports from the main menu to open the Port Impedance
dialog box.
2 The impedance values for any port can be changed by typing the desired
values in the Resistance, Reactance, Inductance and Capacitance fields
in the row labeled with the desired port number.
TIP
Note that the impedance of multiple ports may be changed at the same time
through the first method by selecting multiple ports before selecting Modify ⇒
Port Properties, and by the second method, by modifying all the desired port values
while the Port Impedance dialog box is open.
Special Port Numbering
All ports are assigned a number at the time they are created in the project editor.
There is no limit on the number of ports and the number of ports has a minimal
impact on the analysis time needed for de-embedding. By default, the ports are
numbered by the order in which they are created (i.e. first port created is assigned
the number 1, second port created is assigned the number 2, etc.). With this default
method, all ports are positive and unique. However, there are some applications
that require the ports to have duplicate, or even negative, numbers.
Ports with Duplicate Numbers
All ports with the same number, as pictured below, are electrically connected together.
As many physical ports as desired may be given the same numeric label.
Such ports are sometimes called “even-mode” or “push-push” ports and have
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