Two identical antennas are placed in the θ = p/2 plane as shown in the figure. The elements have equal amplitude excitation with 180° polarity difference, operating of the far-zone resultant electric field strength normalized with that of a single element, both computed for φ = 0, is

Correct Answer:

Explanation:

Normalised array factor = n cos

where φ is the phase difference.

⟹ φ = (βd sin θ cos φ + θ₁)

and θ = 90°, φ = 45°