The Sonnet Box

Sonnet analyzes planar structures inside a six-sided metal shielding box. Port connections are usually made at the box sidewalls. The substrate viewed in the project editor is on the metal bottom of the box and represents the ground plane. Above the substrate are stacked the dielectric layers and metal levels. The side walls of the box are modeled as lossless metal. The top and bottom of the box may be assigned any metal type defined in the geometry project.

There is no limit as to the number of dielectric layers you may have in your circuit, but each layer extends from box side to box side. Each dielectric layer can have only one dielectric constant.

Metals are placed between two dielectric layers and are modeled as having zero thickness.

The size of the box in the xy plane is determined by the size of the substrate. The depth of the box is determined by the sum of the thicknesses of the substrate and dielectric layers.