Question

Which of the following statement is true?

(a) Lens array has different input and output radiators while same radiator is used for reflector array

(b) There is no surface matching required for the lens array

(c) In lens and reflect array same radiator is used for input and output

(d) Lens and reflect array belong to constrained feed systems

This question was posed to me in my homework.

My query is from Phased Array in section Phased, Adaptive and Binomial Arrays of Antennas

Answer 1

The correct answer is (a) Lens array has different input and output radiators while same radiator is used for reflector array

To elaborate: In Lens array, different input and output radiators are used and hence there two surface matching is required. In reflect array the same radiator is used to radiate and collect.Phased array with lens or reflector arrays comes under the optical feed system.