-
In a uniform linear array, four isotropic radiating elements are spaced λ/4 apart.The progressive phase shift between the elements required for forming the main beam at 60º of the end fire array is—
-
- – π radians
-
− π radians 2 -
− π radians 4 -
− π radians 8
Correct Option: C
We know,
| ψ = | d (cos φ – 1) | λ |
where, Q = 60º, d = λ 4
so,
| ψ = | . | (cos 60º – 1) | ||
| λ | 4 |
= – π/ 4
