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6 postsFilters: tag: absorbed-power-density Clear
Intercomparisons of computed epithelial/absorbed power density & temperature rise in anatomical human face models under localized exposures at 10 & 30 GHz
This dosimetry intercomparison evaluated epithelial/absorbed power density and temperature rise in two high-resolution anatomical human face models under localized antenna exposures at 10 and 30 GHz. The study reports a statistical correlation between spatially averaged absorbed power density and temperature rise when appropriate averaging is applied. Antenna type/configuration was identified as the dominant contributor to variability, exceeding differences from averaging methods or anatomical models.
Assessment of Electromagnetic Field Exposure from Multiple Sources Simultaneously in the High- Frequency Range Based on Safety Standards
This conference paper proposes a method to assess combined EMF exposure from multiple simultaneous high-frequency sources using a normalized exposure ratio based on ICNIRP 2020 guidelines. It emphasizes a current gap in standardized absorbed power density (Sab) measurement above 10 GHz and proposes incident power density (Sinc) as a temporary surrogate. The work is framed as supporting compliance verification and safety measure design, with a stated need for future experimental validation and standardization.
Model Variability in Assessment of Human Exposure to Radiofrequency Fields
This review examines how variability in computational dosimetry models affects assessment of human RF exposure from MHz to terahertz frequencies, focusing on SAR, absorbed power density, and temperature rise. It reports that anatomical scaling and model choices can drive meaningful differences in predicted SAR (including higher values in children/smaller models), while temperature-rise predictions are especially sensitive to thermophysiological parameters and vascular modeling. The authors indicate that computed variability remains within ICNIRP/IEEE safety margins but argue that uncertainties warrant ongoing research and refinement as new technologies (e.g., 6G) emerge.
Assessment of spatial-average absorbed power density and peak temperature rise in skin model under localized electromagnetic exposure
This numerical dosimetry study modeled localized RF exposure (3–30 GHz) in multi-layer human skin constructs including skin, fat, and muscle, with an added synthetic blood vessel model. Vascular modeling had negligible impact on peak spatial-averaged absorbed power density and a modest impact on peak temperature rise (about 8% at 3 GHz, <3% above 6 GHz). The authors conclude that including vasculature can refine predictions of localized thermal distributions for dosimetry accuracy.
Traceable Assessment of the Absorbed Power Density of Body Mounted Devices at Frequencies Above 10 GHz
This paper presents a traceable experimental dosimetry method to measure absorbed power density (APD) from body-mounted wireless devices at frequencies above 10 GHz. It combines a miniaturized broadband probe, a composite skin-equivalent phantom, and reconstruction/calibration procedures, with validation using reference antennas. The approach is reported as validated for 24–30 GHz and extendable to 10–45 GHz, supporting regulatory-type testing aligned with international safety standards.
Impact of Anthropomorphic Shape and Skin Stratification on Absorbed Power Density in mmWaves Exposure Scenarios
This dosimetry study used FDTD simulations at 28 GHz to evaluate how skin stratification and anthropomorphic modeling affect absorbed power density (APD) estimates. APD was higher with stratified skin than with homogeneous skin for a wearable patch antenna (16%–30% higher), while plane-wave differences were smaller (<11%). The authors argue that simplified skin models may underestimate exposure in mmWave wearable scenarios.