Developping with 4nec2.
Even though the antenna is close to the ground the radiation angle is still low.
The antenna caracteristics as calculated with 4nec2, the antenna can be directly fed with 50 ohm coax.
The antenna in place, beaming north America. Tested with an OM in New York, he reported a signal 9+10 insthead of a signal 7 with a 2 element full size yagi at 20m above ground
Dimensions:
(Reflector) 22,11m circumference
3,40m spacement
(Radiator) 21,57m circumference
1,00m spacement
(First Director) 20,92m circumference
3,40m spacement
(Second Director) 20,70m circumference