Why do you need circularly polarized antenna for working amateur radio satellites?

Most of the antennas which radio amateurs use on HF/VHF/UHF bands have linear polarization, either vertical or horizontal and are not ideal for satellite communications. Polarization of an antenna is the direction of electric field produced by the antenna and determines the direction of transmission and reception. In circular polarization, the radio wave rotates as the signal propagates. If it rotates to the right, it is known as right hand circular polarization (RHCP) and if it rotates to the left, as left hand circular polarization (LHCP). Using circularly polarized antennas helps to minimize the effects cross polarization losses as the satellite moves through space.

Видео Why do you need circularly polarized antenna for working amateur radio satellites? канала Johnson's TechWorld