Meaning
Spatial displacement increments define the grid spacing used during three-dimensional volumetric SAR measurements in phantom tissue structures. Setting an accurate zoom scan step size guarantees that maximum localized energy absorption is mapped with sufficient spatial resolution to calculate peak 1-gram or 10-gram averaged SAR values accurately. Standards such as IEC/IEEE 62209 specify maximum allowable step dimensions along X, Y, and Z axes based on the transmit frequency.
The measurement volume centers over the peak location discovered during earlier coarse area scans.
Spatial Measurement
Volumetric field mapping requires incremental probe movements along three orthogonal axes. The chosen zoom scan step size directly impacts interpolation accuracy when constructing spatial absorption profiles near antenna feed points. Smaller step increments capture steep spatial field gradients in high-frequency wireless devices, preventing spatial averaging errors during peak SAR extrapolation.
Measurement Duration
Test laboratory efficiency requires balancing spatial measurement resolution against automated test run time. Increasing zoom scan step size shortens probe positioning cycles but risks under-sampling localized power absorption hot spots. Compliant test protocols enforce maximum step limits to prevent test laboratories from sacrificing measurement accuracy for speed.
Standard Compliance
Compliance certification requires adherence to standardized SAR probe positioning protocols. Recording the applied zoom scan step size in official test reports proves that localized RF exposure measurements conform to international regulatory testing standards.
