MLFMMSphericalTransmitMaps

The MLFMMSphericalTransmitMaptype calculates the transmission between an AntennaFieldRepresentation based on equivalent currents and a SphericalFieldSampling. In its implementation, the far-field pattern (i.e., a PlaneWaveExpansion) is calculated from the equivalent current representation first. For maximum efficiencyc the source region is hierrchically divided into boxes arranged in an octree. The overall far-field pattern is calculated by aggregating the far-fields of sources in smaller boxes in a MLFMM-scheme. In the second step, the transmission between the calculated PlaneWaveExpansion and the Spherical FieldSampling is calculated through a PlaneWaveSphericalTransmitMap.

The keyword arguments for the construction of a MLFMMSphericalTransmitMap are described in the following table

Keyword Argument	Short Description
`firstorder::Bool`	If true, spherical coefficients of the incident probe field are treated as `FirstOrderSphericalCoefficients`. A change from `false` to `true` drops all entries which correspond to non-first-order modes. A change from `true` to `false` replaces non-first-order modes by zeros.
`samplingstrategy::SphereSamplingStrategy`	Replace the `SphereSamplingStrategy`. This effectively creates a new instance of `SphericalTransmitMap` from scratch.
`incidentcoefficients::AbstractVector`	Replace the spherical coefficients of the incident probe field by the entries of the input vector. If the `SphericalTransmitMap` is `firstorder`, all entries of the input vector which correspond to non-first-order modes are ignored.