本标准定义了当用于确定暴露于具有已知不确定性的无线通信设备的人体中的峰值空间平均比吸收率（SAR）时，时域有限差分（FDTD）技术的应用方法。它定义了验证被测设备（DUT）数值模型的方法，以及在SAR仿真中使用时评估其不确定性的方法。此外，它定义了确定立方体体积中峰值空间平均SAR的程序，并验证FDTD仿真软件的正确实现。本文件不建议具体的SAR限值，因为这些限值可在其他地方找到，例如国际非电离辐射防护委员会（ICNIRP）发布的指南或IEEE C95.1中找到。

This standard defines the methodology for the application of the finite difference time domain (FDTD) technique when used for determining the peak spatial-average specific absorption rate (SAR) in the human body exposed to wireless communication devices with known uncertainty. It defines methods to validate the numerical model of the device under test (DUT) and to assess its uncertainty when used in SAR simulations. Moreover, it defines procedures to determine the peak spatial average SAR in a cubical volume and to validate the correct implementation of the FDTD simulation software. This document does not recommend specific SAR limits since these are found elsewhere, e.g., in the guidelines published by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) or in IEEE C95.1.