3.2.6.6. A_FMM.Layer.calculate_field

Layer.calculate_field(u: ndarray, d: ndarray = None, x: ndarray = 0, y: ndarray = 0, z: ndarray = 0, components: list = None) → dict

Return field given modal coefficient and coordinates

Coordinates arrays must be 1D. Fields are returned on a meshgrid of the input coordinates.

Parameters:

• u (array_like) – coefficient of forward propagating modes.

• d (array_like, optional) – coefficient of backward propagating modes. Default to None: no backward propagation is assumed.

• x (array_like) – x coordinates.

• y (array_like) – y coordinates.

• z (array_like) – z coordinates.

• components (list of str, optional) – field components to calculate. Default to None: all components (‘Ex’, ‘Ey’, ‘Hx’, ‘Hy’) are calculated.

Returns:

Desired field components. Shape of ndarray is the same as x,y, and z.

Return type:

dict of ndarray

Raises:

ValueError – if other component than ‘Ex’, ‘Ey’, ‘Hx’, or ‘Hy’ is requested.