Question

Which of the following can be the excitation amplitude of binomial array with 4 elements?

(a) 1 3 3 1

(b) 1 2 3 1

(c) 2 1 1 2

(d) 1 4 6 4 1

I got this question in a job interview.

My question comes from Binomial Array in section Phased, Adaptive and Binomial Arrays of Antennas

Answer 1

The correct choice is (a) 1 3 3 1

For explanation: The excitation amplitudes of the binomial array follow a Pascal’s triangle.