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Sonnet User's Guide - Sonnet Software

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Chapter 9 Adaptive Band Synthesis (ABS)<br />

De-embedding<br />

Adaptive data, resulting from an ABS analysis, is either de-embedded or non-deembedded.<br />

With other analysis types, when the de-embedding option is enabled<br />

(default), then both de-embedded and non-de-embedded response data is calculated<br />

and available for display and output. This is not true for an adaptive sweep.<br />

In an adaptive sweep, if you run with de-embedding enabled, de-embedded data<br />

is available for the whole band. Non-de-embedded data is available only for the<br />

discrete data points at which full analyses were performed while synthesizing the<br />

response.<br />

If you wish to have non-de-embedded data for the whole frequency band, you<br />

must perform an adaptive sweep with the de-embed option disabled. Select Analysis<br />

⇒ Setup from the main menu to open the Analysis Setup dialog box, then<br />

click on the Advanced button to open the Advanced Options dialog box. Click on<br />

the De-embed checkbox to disable de-embedding. For details on these dialog boxes,<br />

please refer to Help for the project editor.<br />

For more information about de-embedding, see Chapter 7 "De-embedding" on<br />

page 97 and Chapter 8 "De-embedding <strong>Guide</strong>lines" on page 107.<br />

Transmission Line Parameters<br />

As part of the de-embedding process, em also calculates the transmission line parameters,<br />

Z 0 and E eff . You should be aware that when running an ABS analysis<br />

these parameters are only calculated for the discrete data points at which a full<br />

analysis is run. If you need the transmission line parameters at more data points,<br />

analyze the circuit using a non-ABS analysis.<br />

Current Density Data<br />

Current density data is calculated for your circuit when the Compute Current Density<br />

option is enabled in the Analysis Setup dialog box. For non-ABS sweeps, current<br />

density data is calculated for all the response data. For an adaptive sweep, the<br />

current density data is only calculated for the discrete data points, therefore, your<br />

plot in the current density viewer shows a coarse resolution of your frequency<br />

band.<br />

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