Sonnet User's Guide - Sonnet Software

Sonnet User’s Guide
You can edit the name and attributes of this network including the number of ports
by double-clicking on the entry. This is true of all entries made in the netlist; you
must double-click on them to open the dialog box which allows you to edit the entry
or select the item, then select the Tools ⇒ Modify command from the main
menu.
Netlist Example Files
All of the example files used in this chapter are available in the Att example in the
Sonnet examples. You should copy the entire folder into your working directory
if you wish to execute the examples. For directions on obtaining a Sonnet example,
select Help ⇒ Examples from the menu of any Sonnet program, then click on
the Instructions button.
Cascading S-, Y- and Z-Parameter Data Files
A particularly useful feature provided by a netlist project is the ability to cascade
multiple S-, Y- and Z-parameter data files. There are no restrictions on the file formats
which may be cascaded. For example, you can cascade em Z-parameter data
in Touchstone format with measured S-parameter data in Super-Compact format.
In addition, em can analyze at frequencies which are not included in the data files.
Em automatically interpolates if there are any differences between the requested
frequency points and those in the data files.
A good example of a cascading operation is the project att_cascade.son, which is
included in the Att example for this chapter. A schematic representation of the
two-port circuit is shown below. This circuit consists of two identical thin film resistors
connected in series. The S-parameters from the geometry project analysis
on the thin-film resistor are used as a data file element in the netlist. The desired
output network is the series combination of resistors. The S-Parameter data file,
att_res16.s2p, as well as the geometry project, att_res16.son, used to generate the
data file, are included in the examples for this chapter.
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