-
The beamwidth between first null of uniform linear array of N equally spaced (element spacing = a) equally excited antennas is determined by—
-
- N alone and not by a
- d alone and not by N
- The ratio (N/d)
- The product (Nd)
Correct Option: D
Beamwidth between first nulls is given by relation as follows
| φ = sin-1 |  |  | |
| nd |
where n = no. of sources, separated by d distance apart.
