Sonnet User's Guide - Sonnet Software

Sonnet User’s Guide
• The type of ground node connection
• The terminal width
• If reference planes are used for the Component ports and if so, of
what length
The em environment should be set up to use the Component in the same manner
that the component was measured. The correct setting of the Component properties
is discussed in detail below.
Ground Node Connection
The ground node connection defines how the ground of your Component is connected
to your circuit. There are three types of ground node connections: Sonnet
Box, Floating, and Polygon Edge(s).
NOTE:
The Ideal Component does not use a ground node connection by
definition. The ground node connection needs to be specified for the
Data File and Ports Only Component types.
Floating
Sonnet uses a common ground for all the Component ports associated with a given
Component. This common ground should model as closely as possible how your
component was measured or modeled. Vendors who supply components often
have measured S-parameters or a model which may be used to create S-parameters.
In either case, information about how these values were obtained should also
be available. Use this information to guide your choice of ground node connection.
The three types of ground node connection are discussed below.
When your ground node connection is set to Floating, all the Component ports reference
a common local ground as pictured below. This option should be used if
your Component does not have a ground reference, or if there are no shunt elements
in your component model or measured data. Any shunt admittance is removed
by em.
Floating - No ground reference
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