delta matching transformer

delta matching transformer

[′del·tə ‚mach·iŋ tranz‚fȯr·mər]
(electricity)
Impedance device used to match the impedance of an open-wire transmission line to an antenna; the two ends of the transmission line are fanned out so that the impedance of the line gradually increases; the ends of the transmission line are attached to the antenna at points of equal impedance, symmetrically located with respect to the center of the antenna.