IEC/IEEE 62704-2:2017/AMD1:2025
(Amendment)Amendment 1 - Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz – Part 2: Specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle mounted antennas
Amendment 1 - Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz – Part 2: Specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle mounted antennas
IEC/IEEE 62704-2: 2025 Amendment 1
Amendement 1 - Détermination du débit d'absorption spécifique (DAS) maximal moyenné dans le corps humain, produit par les dispositifs de communications sans fil, 30 MHz à 6 GHz - Partie 2: Exigences spécifiques relatives à la modélisation de l'exposition des antennes sur véhicule, à l'aide de la méthode des différences finies dans le domaine temporel (FDTD)
General Information
- Status
- Published
- Publication Date
- 14-Sep-2025
- Technical Committee
- TC 106 - Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure
- Drafting Committee
- JMT 62704-2 - TC 106/JMT 62704-2
- Current Stage
- PPUB - Publication issued
- Start Date
- 15-Sep-2025
- Completion Date
- 04-Jul-2025
Relations
- Effective Date
- 05-Sep-2023
Overview
IEC/IEEE 62704-2:2017/AMD1:2025 is the Amendment 1 to the international standard that specifies criteria for determining the peak spatial-average Specific Absorption Rate (SAR) in the human body from wireless communication devices operating between 30 MHz and 6 GHz. This amendment focuses specifically on the finite difference time domain (FDTD) modelling techniques used to assess exposure from vehicle-mounted antennas. Developed jointly by the IEC and IEEE under their dual-logo collaboration, the standard sets forth practical requirements, including enhanced modelling of human body tissues and extremities, to ensure accurate simulation of electromagnetic exposure from advanced vehicular wireless systems.
Key Topics
- Finite Difference Time Domain (FDTD) Modelling: Detailed methods for applying FDTD techniques to simulate SAR distribution in humans exposed to electromagnetic fields emitted by vehicle antennas.
- Peak Spatial-Average SAR Assessment: Guidelines for calculating the maximal spatial SAR averaged over 10 grams of tissue, ensuring compliance with international exposure limits.
- Human Body Modelling: Incorporation of standard human body voxel models reflecting realistic anatomical details including extremities (hands, wrists, feet, ankles) and limbs, with specific labelling for tissue differentiation.
- Exposure Evaluation in Extremities and Limbs: Introduction of additional standard models for bystanders and passengers, facilitating differentiated SAR calculations for these critical body parts as required by regulatory guidelines.
- Compliance with Updated Exposure Guidelines: Alignment with current safety requirements from organizations such as FCC, ICNIRP, and IEEE C95.1-2019 to address complex scenarios involving vehicular communication devices.
- Normative References and Data Files: Integration with the parent document IEC/IEEE 62704-1:2017, supplemented by CAD model datasets and dielectric tissue property tables for enhanced reproducibility and verification.
Applications
This amendment to IEC/IEEE 62704-2 plays a vital role in multiple industries and regulatory domains by enabling:
- Automotive Wireless System Safety: Assessing human exposure to radiofrequency emissions from 5G, V2X, and other vehicle-mounted antennas to ensure compliance with exposure limits and safeguard public health.
- Regulatory Compliance Testing: Providing standardized modelling protocols for agencies and manufacturers to evaluate SAR and fulfill certification requirements harmonized globally.
- Electromagnetic Exposure Research: Offering validated models and methodologies for scientific investigation into the biological effects of RF fields emitted by modern vehicle communication infrastructure.
- Product Development and Design Optimization: Assisting engineers in designing safer antenna systems and mitigating RF exposure inside and around vehicles.
- Public Health and Safety Assessment: Supporting risk assessments concerning bystanders and vehicle occupants exposed to continuous or intermittent electromagnetic fields.
Related Standards
- IEC/IEEE 62704-1:2017 – General requirements for using FDTD methods for SAR calculations in human bodies from wireless devices.
- FCC Guidelines on Human Exposure to Radiofrequency Electromagnetic Fields (2020) – Regulatory limits relevant to RF emissions from wireless transmitters.
- ICNIRP 2020 Guidelines – International guidance on limiting exposure to electromagnetic fields from 100 kHz to 300 GHz.
- IEEE Std C95.1-2019 – Safety standards for human exposure to electric, magnetic, and electromagnetic fields from 0 Hz to 300 GHz.
- Additional IEC Publications – Various international electrotechnical standards for measurement and modelling of electromagnetic exposure.
This amendment ensures state-of-the-art accuracy and harmonization in FDTD modelling practices for SAR evaluation related to vehicular wireless communications, positioning itself as an essential international reference for engineers, researchers, regulators, and product developers focusing on safety and compliance in the evolving landscape of wireless technologies in transportation.
IEC/IEEE 62704-2:2017/AMD1:2025 - Amendment 1 - Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz – Part 2: Specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle mounted antennas Released:15. 09. 2025 Isbn:9782832704806
Frequently Asked Questions
IEC/IEEE 62704-2:2017/AMD1:2025 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Amendment 1 - Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz – Part 2: Specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle mounted antennas". This standard covers: IEC/IEEE 62704-2: 2025 Amendment 1
IEC/IEEE 62704-2: 2025 Amendment 1
IEC/IEEE 62704-2:2017/AMD1:2025 is classified under the following ICS (International Classification for Standards) categories: 17.220.20 - Measurement of electrical and magnetic quantities. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC/IEEE 62704-2:2017/AMD1:2025 has the following relationships with other standards: It is inter standard links to IEC/IEEE 62704-2:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
IEC/IEEE 62704-2:2017/AMD1:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
IEC/IEEE 62704-2 ®
Edition 1.0 2025-09
INTERNATIONAL
STANDARD
AMENDMENT 1
Determining the peak spatial-average specific absorption rate (SAR) in the
human body from wireless communications devices, 30 MHz to 6 GHz -
Part 2: Specific requirements for finite difference time domain (FDTD) modelling
of exposure from vehicle mounted antennas
ICS 17.220.20 ISBN 978-2-8327-0480-6
IEC/IEEE 62704-2:2017-06/AMD1:2025-09(en)
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____________
Determining the peak spatial-average specific absorption rate (SAR) in the
human body from wireless communications devices, 30 MHz to 6 GHz -
Part 2: Specific requirements for finite difference time domain
(FDTD) modelling of exposure from vehicle mounted antennas
AMENDMENT 1
FOREWORD
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