Gamma match

Gamma match estimator

Approximates gamma rod step-up ratio, tuning capacitance and rod length for Yagi-style feeds.

Feed-point resistance (Ω)

Feed-point reactance (Ω)

Target feed impedance (Ω)

Frequency (MHz)

Driven element diameter (mm)

Gamma rod diameter (mm)

Centre spacing (mm)

Results provide ballpark starting values; fine-tune on the tower with an analyser.