[TowerTalk] low band antenna without good ground

[Tony Brock-Fisher]

A delta loop is an antenna for the low bands that has vertical polarization but does not need a good ground. An equilateral triangle, apex up, fed 1/4 wavelength from the top, will give vertical polarization. The bottom leg of the delta loop can be only a few feet off the ground, and it provides the 'ground return' for the antenna. The impedance of a single loop is around 100 ohms and can be matched with an electrical quarter wave of 75 ohm coax.

A pair of delta loops can be phased for gain similar to a four-square. I have this antenna for 80 meters with no radials on the ground. Guest ops always remark about how well it plays.

-Tony, K1KP