Question

Which of the following is not true?

(a) Right circular polarized antennas can pick up left circular polarized waves due to propagation effects

(b) Circular polarization has lesser attenuation in free space

(c) Circular polarized wave can follow the curvature of earth

(d) In circular polarization the electric and magnetic fields rotate as they leave the antenna

Answer 1

Correct option is (c) Circular polarized wave can follow the curvature of earth

Easiest explanation: In circular polarized wave the polarization angle of the electric field and the earth is continuously changing. This does not affect the transmission direction and hence circular polarized waves cannot bend with the curvature of earth, like any other EM wave.