http://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/sprayon-antenna-enabled-by-nanoparticles-extends-range-of-antennas-one-hundred-times
I've taped out a 3 element beam antenna with elements about 19 3/4" long using alarm foil tape onto cardboard.
It works. It doesn't last.
And that was years and years ago.
73's
/johnny