Ward Silver wrote:
>> Radiation resistance should be fixed..
>
> Oh, right...duh.
>
> The current equation will do - but the radiator (I may have confused things
> by referring to it as a "dipole") may be anywhere between one-half and one
> wavelength long, so the current won't be a simple cosine function. It
> *will* be zero at the ends :-)
(unless you run a lot of power, and have corona discharge <grin>)
I think Orfanidis's book has the equation you're looking for.. actually
several approximations, of varying fidelity..
I'm pretty sure there's some standard assumptions of the current
distribution shape (ranging from uniform for very short, to triangular
to sinusoidal to something else), possibly broken up into segments.
What sort of accuracy are you looking for?
Jim
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|