antenna_solid_angle

Radio_Astronomy.antenna_solid_angle(aperture_efficiency, geometrical_area, wavelength)

Antenna solid angle of an antenna, assuming radiation efficiency = 1

Krauss, Radio Astronomy, sec. 6-2, cals this the beam solid angle.

Given the aperture efficiency (dimensionless) and the geometrical area and wavelength in the same units (say, meters), this returns the beam solid angle in steradians.

If the antenna has some losses, like not being totally reflective, then the radiation efficiency is not 1 and it should be multiplied with this result.

: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