Question

What is the phase shift of the array is the scan angle is 30° and spacing distance is λ/2?

(a) \(\frac{π}{2} \)

(b) π

(c) 2π

(d) \(\frac{π}{4} \)

I got this question by my college professor while I was bunking the class.

My question is taken from Phased Array topic in portion Phased, Adaptive and Binomial Arrays of Antennas

Answer 1

The correct choice is (a) \(\frac{π}{2} \)

To explain: The phase \(ᴪ=\frac{2π}{λ} dsinθ=\frac{2π}{λ} \frac{λ}{2} sin30=\frac{π}{2} \)