Agilent S-Parameter Simulation

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To calculate group delay:Proceed as in Simulating an Amplifier, setting frequencies and sweep parameters as 1.needed.Edit the S-Parameters component, select the Parameters tab, and enable Group 2.delay.Group delay aperture is an option that is found on network analyzers and behaves 3.similarly here.
The simulator sets the frequency aperture to 0.01% of the currentfrequency. To override the default frequency aperture, enable Group delayaperture and edit the value as needed.Click OK to accept changes and close the dialog box. 4.Simulate. When the simulation is finished, plot the group delay data items, identified 5.by the prefix delay.
This is the absolute group delay, in seconds.Hint If the group delay data appears noisy, increase the value in the Group delay aperture field. If the results appear inaccurate, decrease the value. Generally, adjusting this value by a factor of 10 (in the appropriate direction) improves noisy or inaccurate results.For an example of group delay data, see Obtaining Group Delay Data (cktsim).