Electronics and Communication Engineering - Exam Questions Papers - Discussion


An antenna array comprises of two dipoles that are separated by wavelength. The dipoles are fed by currents of the same magnitude and 90° in phase. The array factor is:

[A]. 2 cos - 2 sin
[B]. 2 cos + 2 sin
[C]. 2 cos
[D]. 2 sin

Answer: Option A


Array factor

φ = 90°.

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