If you have a look at the paper, their antennas are designed to operate between 902-928 MHz, and they test for response at 600MHz-1200MHz, with it attenuating very quickly away from the peak at 900MHz. This is, again, an entirely different thing from VLF and ELF, which operate below 30kHz, at frequencies 20000 times lower.
Different indeed. Sorry about that - it's just that with voices in head there's barely any other priority in your life. Have a nice day.