Correct Answer - Option 3 : Helical
Helical Antenna:
It is a combination of an array of horizontal and vertical wires giving a polarization in both directions resulting in the circularly polarized wave.
Parabolic dish-
It radiates a narrow pencil-shaped beam along the axis of the dish.
Folded Dipole Antenna:
The radiation pattern of circular loop antennas will be the same as that of a folded dipole antenna, which is omnidirectional in nature.
NOTE-
Folded antenna is used in the YAGI-UDA antenna.
