Hello, I am asking you these questions about far field analysis of antennas on the tops because I did not find literature on this. All the analyzes that I have seen are carried out on flat ground. Where NVIS behavior is expected for a dipole in the 40m band using a 6m pole. However I think we can’t use the same analysis for a mountain or can we? So one of my questions is: can we always expect the same form of radiation field at the summits?
According to what I have read, a mountain top in summer can be dry and mineral-free as it washes away in the rains and snowfalls in the other seasons. What if the summit has small dimensions comparable to those of far field radiation?
What will the shape of the radiation pattern be like? Can it be compared to that obtained with a base tower? Although I suppose that in the near field we obtain losses by absorption in the rocks.
I found this field calculator:
I suppose the situation will be different when it is a flat top, in which case, we can expect a little more moisture in the soil, but even so I think we will not have much conductivity due to the effect of the rains. So I ask one other question, will it be a better scenario to use a vertical?
I apologize, for so many questions, I hope they are understood (despite the diagrams!). Thank you very much, 73 de LU1MAW