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On Sep 23, 1:12*pm, Szczepan Białek wrote:
" In 0.05 no currents at all at the *feed point" means, of course, that the current is very very small. However small it is, it is still the greatest current value that exists on that dipole. RF wrote: The current distribution in such short dipoles is triangular in form: highest at the center, and zero at the ends of the dipole arms. S* answered: No such oddity in the reality. No matter how short a dipole antenna is in wavelengths, current is always zero at the ends of each arm of that dipole. The current distribution on a thin, wire dipole takes the form of a sine wave. If the antenna is short, as in this case, then the only part of the sine that can exist is nearly linear. Hence the ~triangular shape for the total current on the dipole. Confirm this for yourself using Figure 2-2(b) on page 2-4 of the following link. http://books.google.com/books?id=xTS... tenna&f=false RF |
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