Thanks to all who have given me advice on inverted-L top sections, and to Dick, PA0SE, who pointed me in the direction of the Admiralty Handbook (Dick, if you have not yet sent the copy, do not bothe
The book gives: Radiation resistance = 160 x pi squared x antenna height squared, all divided by wavelength squared (height and wavelength in same units). By multiplying this by the square of your an
I have also a question regarding the topic of radiation resistance of short verticals (with and without tophats) : All the formulas I saw so far alway assumed the vertical over a perfect ground. This
Pure mathematical the radiation resistance of a short (in wavelength) vertical monopole above a perfect ground is : Ra = 40 . Pi^2 . l^2 / L^2 where Pi = 3.1415... , l = antenna-length , L = waveleng
Pure mathematical the radiation resistance of a short (in wavelength) vertical monopole above a perfect ground is : Ra = 40 . Pi^2 . l^2 / L^2 ... The same vertical with a infinite top-capacitance ha
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) thi
I have also a question regarding the topic of radiation resistance of short verticals (with and without tophats) : All the formulas I saw so far alway assumed the vertical over a perfect ground. This
