The Gamma match is the most used matching device used for yagi beams.

What it does is:

A Yagi almost never has an impedance of 50 ohms. In other chapters i told that Gain, bandwith, F/B etc. all relate to eachother these figures are never all high at one point. A well designed yagi has for that reson an impedance around 20..25 ohms.

A Gamma-match can match impedance below 50 ohms right up to that 50 ohms wich your tranceiver wants to see. Continue reading