= Antenna =

An antenna is some type of conductor, used to propogate radio signals. This is
done because an electric current in metal induces an electromagnetic field.
This can be transmitted and recieved by an antenna. When the antenna recieves
the signal, an electric current is induced in the antenna due to the
intersection of the electromagnetic radiation in a conductor.

*Polarization* is what orientation the electric field is from an antenna. This
is the same orientation as the conductor of the antenna. To get the best
signal, the sending and recieving signals must be of the same polarization.

Due to how signals propagate through the atmostphere, their polarization
changes dramaticly, and therefore it often doesnt matter what oerientation an
antenna has when working with signals that propogate often (such as HF, see
[[frequency_range]]). This phenomenon is called eliptical polarization.