Question

Which of the following is true for uniform linear array elements, to obtain the total field?

(a) The single element field is multiplied by the array factor

(b) The single element field is multiplied by the normalized array factor

(c) The single element field is multiplied by the beamwidth

(d) The single element field is multiplied by the directivity

I got this question during an interview.

I'm obligated to ask this question of Factors topic in division Antenna Array of Antennas

Answer 1

Right option is (a) The single element field is multiplied by the array factor

Easy explanation: Total array field is the field generated by the sum of the individual elements in array and is given simple by multiplying the field due to single element by the array factor. Array factor is the function of antenna positions in the array and its weights. Multiplying the normalized field with the normalized array factor gives the pattern multiplication.