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Dictionary definition: antenna
- Article from:
- A Dictionary of Astronomy
Copyright© A Dictionary of Astronomy 1997, originally published by Oxford University Press 1997. (Hide copyright information)
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antenna
A device used in radio astronomy to detect radio waves; also known as an
aerial
. In an antenna, radio waves induce an oscillating electric current in a conductor. The simplest antenna is a
dipole antenna
, which is a simple metal rod. More complex antennas, such as the
Yagi antenna
, may consist of a dipole or folded dipole (the
driven element
) with other conducting rods (
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