Question

Which of the following is the key feature of the Chebyshev array?

(a) Have constant side lobes and elements are placed uniformly

(b) Have varying side lobes and elements are placed uniformly

(c) Minor lobes are present at |x| > 1

(d) Major lobes are present at |x| < 1

I had been asked this question in examination.

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

Answer 1

The correct option is (a) Have constant side lobes and elements are placed uniformly

The explanation: Chebyshev array exhibits the properties of the Chebyshev polynomial having constant amplitude 1-≤x≤1. Minor lobes are present at |x| < 1 andMajor lobes are present at |x| > 1.