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5.2.6.3. Fields

This section describes fields common to all RF3p simulations. Fields specific to antenna simulations are described in “Fields”.

The simulation parameters determine whether to add electromagnetic fields to the project file, so that they are available for viewing after the solve. Before running the simulation, in the simulation properties dialog box Solver tab, set the Fields Output Frequency pull-down menu to All Frequencies, AMR Frequencies Only, or None, to determine which fields you would like to be able to see, if any. RF3p produces complex electric and magnetic fields, as well as the surface current density when requested. You may view volumetric fields, surface fields (in the case of the current density), and port fields (if the simulation includes one or more wave ports). Fields are organized by frequency, port number and, in waveguide simulations, mode number.

The fields that are extracted from RF3p must be normalized to some value, and you may control that normalization before running the simulation by setting the options under Excitation Amplitude in the port properties dialog box for each of your ports. These options only affect the field normalizations; they do not impact other simulation results. Each port excitation may be defined in terms of either power or voltage amplitude, according to the option chosen as the port properties dialog box Excitation Amplitude Type. Note that the excitation amplitude and type for a particular port have no impact on the fields associated with other ports. In the fields associated with a particular port, that port is the only one with non-zero excitation. By default, the fields associated with a particular port are calculated with 1 W of power applied at that port, and 0 W of power applied at all other ports (although the power at other ports is not forced to 0 W).

The Termination method defines a port's behavior in the fields associated with other ports. If a given port's Termination is set to Matched, that port appears as an impedance-matched load in other ports' fields. If the Termination is set to Open, the port appears to have infinite impedance, so that the fields associated with other ports show no current flowing across this port. If the Termination is set to Short, the port appears to have zero impedance, so that the fields associated with other ports show zero voltage across this port. Note that a port's Termination type has no impact on that port's own fields. By default, Termination is set to Matched.

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