Re: Fractal antennas and Tesla coils

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: m.j.watts@xxxxxxxxxxxx 

On 20 Dec 2005, at 18:24, Tesla list wrote:

> Original poster: Aaron Banerjee <spam_proof@xxxxxxxxxxxxxxxx>
>
>
> I recently attented an interesting presentation on the use of fractal
> antennas.  I was wondering if anyone was building coils designed to
> resonate at multiple, disparate frequencies (e.g. not just w, 2w, etc) or
> at least using coils with multiple resonances. I seem to have enough
> trouble getting my coil to resonate at one frequency, but I thought
> someone out there may have thought of the idea..
>
> Supposing for the moment that you were trying to do the wireless power
> thingy, could a broadband antenna help improve efficiency?  If so, is
> there a good way to broadcast power (e.g. more than just enough for
> a voice/data signal, etc) through one?
>                    - Aaron Banerjee

The receiver would have to be capable of receiving all those
frequencies equally well. Moreover, the fact that it is broadband
implies a lack of selectivity and in the case of a high powered
impulse-driven transmitter, high-powered broadband splatter. Kind
of like an out-of- tune TC. Not a popular device with the neighbours.
I imagine too that group delay would become a serious issue when
it came to efficiency.

Malcolm