A consortium to investigate fractal electrodynamics theory (FET) has a
webpage at this URL.

http://www.tsc.upc.es/fractalcoms/

From the site:

"There is [a] potential limitation of fractal microwave devices that
must be investigated: the loss efficiency. It has been shown that in
fractal geometries electromagnetic fields and currents concentrate
into very small regions. Since the power loss due to Joule effect is
proportional to the square of the electric current density integrated
along the device surface, current concentration in small areas produce
much larger power losses than more uniform current distributions. This
effect may result in antennas having much lower gain... "

The articles and links are very interesting.