so one needs a sine generator as a master clock and then to couple the output of the that generator to multiple antenna.
to also create the harmonics of the field as well, so, third time's the charm:... it's a sine generator with matching correct harmonics and a set of coupled antennas.
Then.... it's a proper multiple generator set up.
So now we'll have more RFI/EMI in the room which we've been trying to eliminate.