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What term describes an unbalanced feed system in which the driven element of an antenna is fed both at the centre and a fraction of a wavelength to one side of centre?
The gamma match
A gamma match is an unbalanced matching system for dipole or Yagi driven elements. The coaxial cable outer conductor (braid) connects to the center of the element, and the inner conductor taps onto the element via a series capacitor and a rod (gamma rod) parallel to the element.
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