The driven element of a Yagi antenna is connected to a coaxial transmission line. The coax braid is connected to the centre of the driven element and the centre conductor is connected to a variable capacitor in series with an adjustable mechanical arrangement on one side of the driven element. The type of matching is:

The gamma match is a very common method for feeding a balanced antenna, like the driven element of a Yagi, with an unbalanced feedline, like coaxial cable. It accomplishes this by connecting the coax shield to the center of the element and tapping the center conductor out to one side of the element. The "adjustable mechanical arrangement" on one side creates an unbalanced parallel matching section. Because this parallel rod adds inductive reactance, a variable capacitor in series is used to cancel it out, providing a perfect resistive match. Distractors like the T-match are similar but use connections on both sides of the driven element, whereas the gamma match specifically attaches to only one side.