Original Structure Values

Note: this feature is implemented on the subset of Speedstack's structures listed at the end of this note.

When a stackup design arrives for fabrication, the requested structure trace widths and separation values often have to be adjusted, on a per structure basis, by the fabricator.

Speedstack's Original Structure Values feature ensures that the requested parameter values as specified by the designer are retained. The original trace width and separation values for the selected structure are shown highlighted below.

Thus, even if goal seeking is used to arrive at new parameter values, the original structure values are not overridden. but remain available for reference

Displaying the original structure vales

Note that parameter values unused by the structure are shown as zero.

Displaying the original structure values in the Technical Report

The original structure values may be may be included as selectable columns for the Structure Table on the Technical Report. So the report will contain before and after values. Use the Select Controlled Impedance Table Columns dialog to select and position the original parameter values

The original parameter values are shown (highlighted) alongside the current active values

Speedstack structures implementing Original Structure Values feature

Coated Microstrip 1B
Edge-Coupled Coated Microstrip 1B
Coated Coplanar Strips with Ground 1B
Coated Coplanar Waveguide with Ground 1B
Diff Coated Coplanar Strips with Ground 1B

Embedded Microstrip 1B1A
Edge Coupled Embedded Microstrip 1B1A
Edge Coupled Embedded Microstrip 1B1A1R

Offset stripline 1B1A
Offset Coplanar stripline 1B1A
Offset Coplanar Waveguide stripline 1B1A
Edge Coupled Offset Stripline 1B1A
Edge Coupled Offset Stripline 1B1A1R
Diff Offset Coplanar Waveguide 1B1A

Offset Stripline 2B2A
Edge Coupled Offest Stripline 2B2A

Broadside-Coupled Stripline 2S