Plot of normalized primary beam patterns in 1-d cross-section for receptor polarizations  {R,L} with a beam squint equal to 5% of the full-width at half-maximum θ_b; the x-ordinate for the beam pattern plot is in units of θ_b. The ratio of the two beam patterns is also plotted in the upper part of the diagram as a function of pointing error ϵ_p, with x-ordinate ).