1 Scope
This document specifies computational procedures for conservative and reproducible
computations of power density (PD) incident to a human head or body due to radio-frequency (RF) electromagnetic field
(EMF) transmitting devices. The computational procedures described are finite-difference
time-domain (FDTD) and finite element methods (FEM), which are computational techniques
that can be used to determine electromagnetic quantities by solving Maxwell’s equations
within a specified computational uncertainty. The procedures specified here apply to exposure evaluations for a significant majority
of the population during the use of hand-held and body-worn RF transmitting devices.
The methods apply to devices that can feature single or multiple transmitters or antennas,
and that can be operated with their radiating part or parts at distances up to 200 mm
from a human head or body.
This document can be employed to determine conformity with any applicable maximum
PD requirements of different types of RF transmitting devices used in close proximity
to the head and body, including those combined with other RF transmitting or non-transmitting
devices or accessories (e.g. belt-clip), or embedded in garments. The overall applicable
frequency range of these protocols and procedures is from 6 GHz to 300 GHz.
The RF transmitting device categories covered in this document include but are not
limited to mobile telephones, radio transmitters in personal computers, desktop and
laptop devices, and multi-band and multi-antenna devices.
The procedures of this document do not apply to PD evaluation of electromagnetic fields emitted or altered by devices or objects intended
to be implanted in the body.
NOTE For the evaluation of the combined exposure from simultaneous transmitters operating on frequencies below 6 GHz, the relevant standards for SAR computation are IEC/IEEE 62704‑1:2017 and IEC/IEEE 62704‑4:2020.