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S-parameter

EMA3D and MHARNESS support calculating the scattering parameters matrix of any arbitrary interconnection structure and exporting it in Touchstone format.The touchstone file can be used in conjunction with a circuit simulator with other elements to evaluate scattering parameters or the time-domain response of a complex circuit.

Before running an S-parameter simulation, ports must be assigned to the model. A separate EMA3D and/or MHARNESS simulation is run for each port defined.

An S-parameter model can be run using either the Integrated EMA3D-MHARNESS solver or a standalone MHARNESS simulation. The S-parameter SPort Image 16 color button is the same in both the EMA3D and MHARNESS panels, and users may select it under either tab.

Start and run an S-parameter simulation

  1. Under the MHARNESS tab in the ribbon, click the S-parameter SPort Image 16 button from within the Analysis section.

    mh startsparam 2

  2. MHARNESS will begin pre-processing and generating files necessary for running the simulation. The status of the pre-processing and any errors or warnings will be logged in the pop-up window. If an error appears and needs to be fixed, close out of the pop-up window and address it before re-starting at step 1 of this section.

    mh start 1

  3. Once the pre-processing is finished, run the simulation by selecting Run in the pop-up window. It is now safe to click the X in the upper-right corner of the pop-up window to close it.

  4. The analysis panel, located near the structure and simulation panels, will show the progress and status of the simulation, as well as any runtime errors.

    mharness startfile 3

  5. The S-parameter simulation produces a Touchstone SnP file that can be used in conjunction with a circuit modeler. This file is located in the results folder.

See Also

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