What are circularly polarized electromagnetic waves?
Waves with an electric field bent into a circular shape
Waves with rotating electric and magnetic fields✓Bonne réponse
Waves that circle Earth
Waves produced by a loop antenna
Explication
A circularly polarized wave is the sum of two equal linear components a quarter cycle apart in phase, so the field vectors rotate once per RF cycle as the wave advances while their magnitude stays constant. The fields are not bent into circles, the wave's route around the Earth is a separate matter, and a plain loop antenna radiates linear polarization.