I'm certainly no expert, but the Wikipedia article on the subject says this: > All radio (and microwave) antennas used for transmitting or receiving are intrin

I'm certainly no expert, but the Wikipedia article on the subject says this: > All radio (and microwave) antennas used for transmitting or receiving are intrinsically polarized. They transmit in (or receive signals from) a particular polarization, being totally insensitive to the opposite polarization; in certain cases that polarization is a function of direction. Most antennas are nominally linearly polarized, but elliptical and circular polarization is a possibility. As is the convention in optics, the "polarization" of a radio wave is understood to refer to the polarization of its electric field, with the magnetic field being at a 90 degree rotation with respect to it for a linearly polarized wave. https://en.wikipedia.org/wiki/Polarization_(waves)#Radio_transmission_and_reception https://en.wikipedia.org/wiki/Polarization_(waves)#Radio_tra... So it's less that it helps, and more that it's inevitable.