directivity

Radio_Astronomy.directivity(aperture_efficiency, geometrical_area, wavelength)

Forward gain of an antenna over an isotropic antenna as a factor

Given the aperture efficiency (dimensionless) and the geometrical area and wavelength in the same units (say, meters), this returns the forward or directive gain.

:param aperture_efficiency : :type aperture_efficiency : float

:param geometrical_area : typically pi*(diam/2)^2, same units as wavelength :type geometrical_area : float

:param wavelength : same units as antenna diameter :type wavelength : float

Returns

float