Discussion :: Electromagnetic Field Thoery
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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
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Answer : Option D
Explanation :
Normalised array factor = n cos 
where φ is the phase difference.
φ = (βd sin θ cos φ + θ1)
and θ = 90°, φ = 45°
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