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In which of the following scanning the phase of the radiators varies incrementally for scan?

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In which of the following scanning the phase of the radiators varies incrementally for scan?

(a) Phase scanning

(b) Frequency scanning

(c) IF scanning

(d) Beam forming

The question was posed to me in examination.

Origin of the question is Phased Array in portion Phased, Adaptive and Binomial Arrays of Antennas

1 Answer

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The correct answer is (a) Phase scanning

To explain I would say: In phased array radar a single radiator is used to feed antenna with different phase shifts and thus the desired beam width is obtained. In phase scanning the phase shifters are used and radiators have different phases. The incremental phase shift of the phase array radar with d element spacing and scan angle θ is given by \(ᴪ=\frac{2π}{λ} dsinθ. \)

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