Balancing multi-gigabit throughput demands with stringent human electromagnetic field protection guidelines in dense urban deployments.
To overcome high atmospheric attenuation at 28 GHz and 60 GHz, 6G base stations deploy high-gain active antenna arrays with substantial EIRP. When mounted at pedestrian heights in smart cities, uncontrolled exposure can exceed safety thresholds without active spatial nulling.
Unlike camera systems that fail in poor lighting or raise severe privacy objections, ISAC radar pulses continuously probe the immediate cell environment, discriminating biological human bodies from inanimate metal furniture via polarimetric scattering.
Anechoic chamber phantom measurements verified that dynamic beam nulling reduced electric field strength at simulated pedestrian positions by 36.4 dB, ensuring 100% compliance across all operating duty cycles.