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HFSS15: Active or Passive Excitations in HFSS Transient

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In HFSS Transient, each excitation (port, plane wave, voltage, or current source) shall be “active” (with all ports active they each get an excitation one at a time, and a full S-matrix will be produced). If you want to save simulation time, you can make only one or a few ports of interest “active”. The passive ports will act as terminations. You will get only a partial S-matrix.

For wave ports, you specify “Active” using the checkbox on the General tab for the excitation.

For an incident wave source, you use the Active or Passive radio buttons on the Transient Tab. You can also specify Magnitude and Delay..

For excitations in HFSS Transient Composite Excitation solutions (and not HFSS Transient Network solutions), if you select Active, you can specify additional parameters for the excitation.

The Transient Composite Excitation Solution type has more time profiles. In this case, the time profiles are defined as part of the excitations, because excitations can have individual profiles in a Composite Exciation solution analysis. The profile includes two plots. The upper plot shows the excitation of interest given the currently specified parameters. The lower plot shows the energy spectrum of the upper plot. The lower plot parameters include the Min and Max frequencies.

The following table describes the parameters for the upper plots.


Related Topics

Adding a Solution Setup for Transient Solutions

Transient Network Analysis Solution Input Signal Tab: A Time Profile

Setting Magnitude and Delay for Transient Excitations

Differential Pairs in HFSS Transient Network

Technical Notes: Transient Solution Theory

Technical Notes: Excitations in the Time Domain

Options Tab for Transient Solution Setup

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