BS IEC/IEEE 62704-1:2017

What is BS IEC/IEEE 62704-1- Finite difference time domain (FDTD) about? 

BS IEC/IEEE 62704-1 is a safety standard on determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices. 

BS IEC/IEEE 62704-1 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. BS IEC/IEEE 62704-1 defines methods to validate the numerical model of the device under test (DUT) and to assess its uncertainty when used in SAR simulations. Moreover, BS IEC/IEEE 62704-1 defines procedures to determine the peak spatial-average SAR in a cubical volume and to validate the correct implementation of the FDTD simulation software. The applicable frequency range is 30 MHz to 6 GHz. 

Note 1: Cubical averaging volumes are applied in all current experimental standards for the assessment of the peak spatial-average SAR (psSAR) and are recommended by [1], [2], and [3]. Other averaging volumes have been proposed, for example, in [1], and may be included in future revisions of BS IEC/IEEE 62704-1. 

Note 2: BS IEC/IEEE 62704-1 does not recommend specific SAR limits since these are found elsewhere, for example, in the guidelines published by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) [1] or in IEEE Std C95.1 [3]. 

Who is BS IEC/IEEE 62704-1- Finite difference time domain (FDTD) for?  

BS IEC/IEEE 62704-1 on specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle-mounted antennas is relevant to: 

• Electromagnetic engineers 
• Electrical and electronic engineers 
• Electricians 
• Manufacturers of wireless communication devices 
• Manufacturers of multi-input multi-output communication devices 
• Power density personnel 
• Testing authorities of specific absorption rate (SAR)  
• Suppliers of antennas 

Why should you use BS IEC/IEEE 62704-1- Finite difference time domain (FDTD)? 

Computational techniques have reached a level of maturity that allows their use in compliance assessments of wireless communication devices with vehicle-mounted antennas.  

BS IEC/IEEE 62704-1 provides benefits to the users and regulators that include standardized and accepted protocols, anatomically correct body models, validation techniques, benchmark data, reporting format, and means for estimating the computational uncertainty to produce valid, accurate, repeatable, and reproducible data.