Ultra Miniture Antenna Using Acoustic Resonators

I have recent ley come across academic papers making big claims in radio antenna miniaturisation. This paper in Nature using SAW resonators and this one in IEEE Transactions on Antennas and Propagation using bulk acoustic wave (BAW) resonators. It may be quite a while before this technology is available as usable devices on the market, but it always good to know what is on the horizon.