I forgot one thing to mention in my previous mail : a short vertical
monopole above a perfect ground has a gain of 4.77dBi or 2.62dBd (due to
the radiation pattern), so you have to add (multiply) this 4.77dBi (or
power-factor 3) to get your EIRP or alternatively add (multiply) 2.62dB
(power-factor 1.83) to get your ERP.
For EIRP is P = 3 x Ra x I^2
For a wavelength of 2200m and a vertical monopole of length L without
topload :
Peirp = 0.245 x L^2 x I^2 (P in mW, L in m, I in A)
For a wavelength of 2200m and a vertical monopole of length L with infinite
topload :
Peirp = 0.979 x L^2 x I^2 (P in mW, L in m, I in A)
For ERP is P = 1.83 x Ra x I^2
For a wavelength of 2200m and a vertical monopole of length L without
topload :
Perp = 0.149 x L^2 x I^2 (P in mW, L in m, I in A)
For a wavelength of 2200m and a vertical monopole of length L with infinite
topload :
Perp = 0.597 x L^2 x I^2 (P in mW, L in m, I in A)
73, Rik
Rik Strobbe ON7YD
[email protected]
Villadreef 14 B-3128 Baal BELGIUM (JO20IX)
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