The current you refer to there is not the power that is being generated though, it seems to be an input in to the STO devices. > The STOs are connected in para

The current you refer to there is not the power that is being generated though, it seems to be an input in to the STO devices. > The STOs are connected in parallel (Fig. 1a) or in series (Fig. 1b) configuration, stimulated by a single dc source. For the parallel connection, at the dc bias (Idc) value of 1.5 mA Fig 2c and d shows the total output power which maxes out at 0.85 uW. Maybe this is enough to run a pacemaker or something small, I don't actually know. Fig 6 shows the rectification of the signal in to a voltage that can turn on an LED. The dc-dc converter puts it in the ~3V range. Assuming the dc-dc converter is near 100% efficiency (some are pretty damn good) this is a current of only 0.28 uA. Its a novel way, but they talk about in their own paper that it is not a new more efficient way to convert RF energy to DC energy > in the range of 1.65–2.8 GHz at Prf = 0 dBm and zero dc bias ac to dc conversion efficiency of ∼6% at Prf = −20 dBm. This is higher than the reported values for STOs53,55 but less than the recent reports of power conversion efficiency of 40% and 40–70% at an input rf power ~0 dBm for MoS2-based flexible rectenna and state-of-the-art Si and GaAs rectifiers56