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balun - technical definition
A passive device, often a transformer, used to couple an electrically balanced device, medium, or system and an electrically unbalanced device, medium, or system. A balun commonly is used to connect an electrically balanced twisted pair to an electrically unbalanced coaxial cable. The term balun is a contraction of balanced to unbalanced transformer. See also balanced, coaxial cable, passive, transformer, twisted pair, and unbalanced.
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(BALanced UNbalanced) A device that connects a balanced line to an unbalanced line; for example, a twisted pair to a coaxial cable. A balanced line is one in which both wires are electrically equal. In an unbalanced line, such as a coax, one line has different properties than the other.
Balun
The BNC connector on the left connects to coaxial cable. The screw connectors on the right connect to telephone style twisted wire pairs. (Image courtesy of Black Box Corporation.)
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