19 lines
908 B
Plaintext
19 lines
908 B
Plaintext
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= Antenna =
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An antenna is some type of conductor, used to propogate radio signals. This is
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done because an electric current in metal induces an electromagnetic field.
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This can be transmitted and recieved by an antenna. When the antenna recieves
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the signal, an electric current is induced in the antenna due to the
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intersection of the electromagnetic radiation in a conductor.
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*Polarization* is what orientation the electric field is from an antenna. This
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is the same orientation as the conductor of the antenna. To get the best
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signal, the sending and recieving signals must be of the same polarization.
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Due to how signals propagate through the atmostphere, their polarization
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changes dramaticly, and therefore it often doesnt matter what oerientation an
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antenna has when working with signals that propogate often (such as HF, see
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[[frequency_range]]). This phenomenon is called eliptical polarization.
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