TCI signal's wave-length belongs in the area of near-field communication. The signal is strongest within the coil and decays rapidly outside.
This limits the amount of crosstalk between coils and also there is minimal interference with other RF signals.
EMI (Electromagnetic Interference) between TCI and other RF signals is negligible. The magnetic field created by TCI is a few orders of magnitude lower than that created by clock distribution. Any design mechanism chip designers use to shield EMI from clock lines to RF signals can also be applied to TCI.
Magnetic field strength within TCI is a few orders of magnitude higher than any EMS (Electromagnetic Suspension) sources such as a phone antenna.