Specifying the Frequency Points to Solve
You can specify the following types of frequency points to solve within a frequency sweep:
A linear range of frequency points in which you specify a constant step size. |
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A linear range of frequency points in which you specify the number, or count, of points within the frequency range. |
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A logarithmic range of frequency points in which you specify a frequency range and a samples number. |
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Individual frequency points. For Discrete sweeps. |
Select the type of frequency point entry from the Type dropdown menu.

Edit Frequency Sweeps window contains a Time Domain Calculation tool that you can use to help calculate frequency step sizes and maximum frequencies, particularly if you intend to perform Full-Wave Spice analysis. For Discrete sweeps, HFSS always solves the frequencies from highest to lowest.