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Antenna (radio): In radio engineering, an antenna or aerial is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. In transmission, a radio transmitter supplies an electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves .
Antenna (biology): Antennae , sometimes referred to as "feelers", are paired appendages used for sensing in arthropods. Antennae are connected to the first one or two segments of the arthropod head.
Antenna gain: In electromagnetics, an antenna's power gain or simply gain is a key performance number which combines the antenna's directivity and electrical efficiency. In a transmitting antenna, the gain describes how well the antenna converts input power into radio waves headed in a specified direction.
Antenna TV: Antenna TV is an American digital subchannel television network that is owned by Nexstar Media Group. The network's programming consists of classic television series from the 1950s to the early 2000s, most of which are sourced from the content library of Sony Pictures, along with a selection of series from Universal Pictures, Metro-Goldwyn-Mayer and Carson Entertainment.