
Dr. Mühlhaus Consulting & Software GmbH
www.muehlhaus.com
info@muehlhaus.com
6
Make Sonnet View. Based on the layout view of a cell, the designer can easily create the
Sonnet analysis view for that cell. If the cell layout contains hierarchy, the hierarchy will be
resolved to create a flattened Sonnet EM view.
Define the analysis box. With Sonnet's FFT based approach to method of Moments, it is
necessary to define a finite analysis area ("box") and a uniform sampling resolution ("cell
size"). This defines the granularity for the analysis, and usually requires a trade off
between analysis time and accuracy. The user defined cell size is very useful to control the
meshing density of very complex shapes, to avoid over-meshing the circuit without any
need for manual clean-up.
Assign port numbers and properties.
In Sonnet, circuit ports connect the analysed structure with
the outer circuit. Different port types are available for
different purposes. Cadence pins can be converted to Sonnet
ports fully automatically, based on the defined mapping.
Where needed, feed lines will be extended to the boundary
of the analysis area automatically, and de-embedded from
the analysis results.
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