We analyze physics-driven trade-offs across915 MHz, 2.4 GHz, 5.8 GHz, 28 GHz, and 60 GHz for RF neuralinterfaces. Using skin depth, diffraction-limited resolution,and coherence-time–limited control, we quantify: (i) sub-GHzachieves ∼18.6 mm penetration versus ∼3.36 mm (28 GHz)and ∼2.30 mm (60 GHz), a ∼6–8× depth difference; (ii)mmWave offers ∼31× finer λ/2 resolution than sub-GHzat equal aperture; … Continue reading Multi-Band Trade-offs: 2.4 GHz vs 5.8 GHz vs mmWave vs sub-GHz Depth vs Resolution vs Safety with Controller Robustness