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Selecting a Microstrip Substrate

For Nexxim designs that are created with the Schematic Editor in Designer, you can select a predefined microstrip substrate to apply to all distributed elements instantiated in a design. The selection of a technology is made from the Choose Layout Technology dialog box that appears when you select Insert Nexxim Circuit Design from the Project menu:

Select the desired substrate technology and click Open. To choose a technology that is not on the list, click Browse. Using the Open dialog box, browse to and select the Ansoft Technology (.asty) file that contains the technology you want to use, and then click Open. When a substrate has been selected, Designer creates a .SUB entry for this substrate type in the internal netlist representing the schematic design.

Then, when a distributed element is instantiated, it includes a SUBSTRATE=substrate_name entry in its netlist syntax. Designer automatically inserts the substrate_name that was selected from the Choose Layout Technology dialog box (FR4 in the example pictured above) into the internal netlist entry for the instantiated element.

If you wish to use a custom substrate type (or no substrate type) instead of one of the predefined types, click None. The design opens, but no substrate type will be applied to instances of distributed elements unless you either create a custom substrate type or select a predefined type on a component-by-component basis.

Note

All distributed elements in a given design must use the same substrate type.


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