Read some of the "scientific" papers and test standards and you'll weep for the death of science. The workers in this field must have heads filled with the same jello as used in their phantom heads. E.g. Their models predict mm-cubed hotspots from wavelengths two orders of magnitude larger; a feat of sub-wavelength focussing that should revolutionize technology. E.g. Test standards that mandate mm-precise positioning of the Phone Under Test because if it shifts by a fraction of a degree the results change (i.e. it's a random number generator). The results on a good day might provide one significant figure of accuracy, but are naively reported to three or four digits of noise.