The Electromagnetic Waves, Frequency Domain interface supports far-field analysis. To define the far-field variables use the Far-Field Calculation node. Select a domain for the far-field calculation. Then select the boundaries where the algorithm integrates the near field, and enter a name for the far electric field. Also specify if symmetry planes are used in the model when calculating the far-field variable. The symmetry planes have to coincide with one of the Cartesian coordinate planes. For each of these planes it is possible to select the type of symmetry to use, which can be of either
symmetry in E (PMC) or
symmetry in H (PEC). Make the choice here match the boundary condition used for the symmetry boundary. Using these settings, the parts of the geometry that are not in the model for symmetry reasons can be included in the far-field analysis.
The Far-Field Domain and the
Far-Field Calculation nodes get their selections automatically, if the Perfectly Matched Layer (PML) feature has been defined before adding the
Far-Field Domain feature.
For example, the name Efar is entered and the geometry is Cartesian with the independent variables
x,
y, and
z, the generated variables get the names
Efarx,
Efary, and
Efarz.
where the variables theta and
phi are defined to represent the angular direction
in radians. The magnitude of the far field and its value in dB are also generated as the variables
normEfar and
normdBEfar, respectively.