It does require a PI network antenna tuner that must be located at the base of the vertical part of the antenna.
Vertical part is a minimum of one wavelength long at 6 meters
The radials * counterpoise* are of 1/4 wavelength each , spreading around
in a circle at the extreme end of the sloping wire.
The sloping wire must be at least one meter above the ground
If you make the sloping wire longer, , that is more than three
wavelengths .the antenna's directional properties will be enhanced