Antenna
Radiating system used to transmit and receive radio signals. There are
many different types of antenna, whose dimensions vary with the
frequency and the desired gain. Common antenna types include:
Rotor
Wire antennas are usually fixed, while directional antennas are beamed
to the target by an azimuthal rotor. Those used for
satellites o for
EME are also moved on the vertical plane
by another rotor.
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