The polarization in which E field radiates energy in both the horizontal
plane and vertical plane and in all the planes in between is known as
circular polarization. In this polarization, electric field has two linear
components which are perpendicular to each other with equal amplitude
and 90 degree phase difference. The resulting E-field rotates in a circle
around the direction of propagation. Based on direction of rotation there
are two types, RHCP(Right Hand Circular Polarization) and LHCP(Left
Hand Circular Polarization). Circularly polarized light signal can be
generated by passing linear polarized light signal through quarter wave
plate (λ/4) at angle of 45 degree to the optical axis of plate.
RHCP (Right Hand Circular Polarization): In this type, electric field rotates
clockwise as seen by an observer towards whom the wave is moving.
• LHCP (Left Hand Circular Polarization): In this type, electric field rotates
counterclockwise as seen by an observer towards whom the wave is