[Antennas] take off angle

[Danny Richardson]

At 10:18 AM 11/16/2006, you wrote:

>I am NOT convinced that radials have any impact on take-off angle and ONLY 
>on efficiency.
>
>Are there any articles written on the subject that anyone would be able to 
>point to?
>
>Thanks,

You are correct as most radial systems normally extend out to no more than 
about ¼-wavelength. A monopole's far field is formed by the combining of 
ground reflections and/or refractions out to many wavelengths from the 
antenna and the radials make up only a very small portion of that. For the 
radials to have an effect on launch angle, they would have to extend 
several wavelengths.

This can be easily confirmed using computer modeling.

73,
Danny, K6MHE





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