After lunch we had to wait for our boat safari and I thought it was a nice idea
to calculate a 50 MHz Horizontal Dipole Array (HDA) aka 2 elements to be
easily and quickly built when we arrive in Thondwe on Monday.
Within the boundary conditions (Z = 50 + j0 Ohm) the contrapsion converged to an
acceptable radiation pattern and impedance. I tried some other model solutions
(there are many ways to Rome) but that didn’t make much difference.
Of course more elements will improve vertical/horizontal radiation patterns,
but this antenna may be a nice (mechanical) substitute for a HB9CV.
Bear in mind, most Yagi’s are presented in free space with nice radiation patterns.
However, when you put them in the air above real ground,
(vertical)radiation patterns deteriorate significantly!
For co-calculators, here’s the NEC-file.