- A concave reflecting surface with a paraboloid shape, which concentrates waves into a parallel beam. Used, for instance, in dish antennas.
- An antenna incorporating a dish (1). Such an antenna features very high gain, usually operates at microwave frequencies, and has various applications, including its use in satellite communications and in radar. The driven element of a dish antenna is located at the focal point of its dish reflector. Also called dish antenna, parabolic antenna, paraboloid antenna, or paraboloidal antenna.
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