Re: Fwd: Re: LF: VK1OD's analysis of the MiniWhip antenna

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Hi Pieter-Tjerk,

Am 13.07.2013 12:35, schrieb Pieter-Tjerk de Boer:
> [...]
> It is physically impossible for the probe to cross multiple equipotential
> lines.
>    
Yes, sure. My explanation was not complete. Of course the  plate is at 
one potential, just as the grounded pole. So the equipotential lines in 
the sketch will go a different way when the probe is placed on the top 
of the pole. I meant that the optimal position of the probe must be 
there, where the density of the equipotential lines (and so the E field 
strength) is as high as possible, so that the capacity against the far 
field is as high as possible and the capacity to the grounded pole is as 
low as possible, so that the capacitive divider is optimized.
This was my comparison to the transmit antenna as well. It will not help 
just to increase the capacity (just to need less L so the coil losses 
are reduced) when the E field lines are nearly exclusively and directly 
run to ground (like in a fixed grounded capacitor across the coil). This 
describes the capacity between probe and ground...
73, Stefan/DK7FC