How consistent the per-coil peak field is across a multi-coil mat. Reported as the coefficient of variation (CV = standard deviation divided by mean) of detected coil peaks, expressed as a percent. Lower CV means tighter coil-to-coil consistency. Under 5% is tight uniformity (well-matched coils, consistent drive). 5–15% is moderate. Over 15% is a wide spread that may indicate construction variance or measurement positioning issues. The metric excludes the surface (z=0) center field and uses each coil's local peak as the comparison anchor.
A mat spreads many coils across a wide surface, and each coil lays down its own field footprint. How many coils there are is the coil count, how they are arranged is the coil layout, and the surface they cover together is the coverage area. When every coil peaks at about the same strength the coverage is uniform, and the field that spills from one coil into its neighbor is neighbor coupling.
