kirchhoffSurfaceIntegral

kirchhoffSurfaceIntegral Parameters

fields (string vector, required)

The fields used in the transformation. The ordering E, dEdx, dEdy, dEdz, dEdt is assumed.

lightSpeed (float, optional)

Speed of light in medium.

dtFar (float, optional)

Time seperation of far field time points.

numSurfacePoint (non-negative integer, optional)

Number of integration points around Kirchhoff circle.

timeInterval (float vector, required)

Time interval over which to compute far field.

position (float vector, optional)

Position of far field point.

centerSphere (float vector, required)

Center of Kirchhoff sphere.

radiusSphere (float, required)

Radius of Kirchhoff sphere.

haveNormalDeriv (0 or 1, optional)

Set to read normal derivatives of fields on Kirchhoff sphere.

radiusFarSphere (float, optional)

Radius of far sphere.

numTheta (non-negative integer, optional)

Number of polar angles on the far sphere.

numPhi (non-negative integer, optional)

Number of azimuthal angles on the far sphere.

# Far field parameters
# Radius of the Kirchhoff sphere
$ RS = 1.0
# Distance of far field from center of sphere
$ DFF = 10.0
# Far field time interval
$ TFFMIN = (DFF + RS) / LIGHTSPEED
$ TFFMAX = TFFMIN + 1.0 / FREQ_ANT
$ NTFAR = 10
$ DTFAR = (TFFMAX - TFFMIN) / NTFAR
# Number of integration points around
#    a circular slice of the Kirchhoff sphere
$ NS = 10

<History farField>
  kind = kirchhoffSurfaceIntegral
  # The ordering E, dEdx, dEdy, dEdz and dEdt is assumed by kirchhoffSurfaceIntegral
  fields = [emField.centerE emField.dEdx emField.dEdy emField.dEdz emField.dEdt]
  radiusFarSphere = DFF
  numTheta = 9
  numPhi = 18
  dtFar = DTFAR
  # For a single far field time at TFFMIN, we use a timeInterval of length 0
  timeInterval = [TFFMIN TFFMIN]
  # The Kirchhoff sphere must be contained entirely within the computational domain
  centerSphere = [0.0 0.0 0.0]
  radiusSphere = RS
  numSurfacePoint = NS
</History>