Selecting a Far-Field Quantity to Plot

Variables

Intrinsic variables, such as frequency or theta, or user-defined project variables, such as the length of a quarter-wave transformer.

Output Variables

User defined expressions applied to derive quantities from the original field solution.

Gain

Gain is four pi times the ratio of an antenna’s radiation intensity in a given direction to the total power accepted by the antenna.

Axial Ratio

Axial ratio of the electric field.

Antenna Params

Designer-calculated quantities that include peak directivity, radiated power, accepted power, radiation efficiency, max U, and array factors. For far-field setups, the decay factor for lossy materials is calculated as a constant for all far fields.

Radar Cross-Section (Bistatic RCS)

For designs with Plane Incident Waves. (RCS is not supported for other types of incident waves).

The radar cross-section (RCS) or echo area, σ, is measured in meters squared and represented for a bistatic arrangement (that is, when the transmitter and receiver are in different locations). This is represented by

where

• E_scat is the scattered E-field.

• E_inc is the incident E-field.