Contents I. Introduction
Electromagnetic field exposure laws must be met by any equipment that emits radiofrequency (RF) waves close to the head or body. Significant numbers of nations have established worldwide exposure guidelines as recommended by the World Health Organization (WHO) in order to protect against the negative health consequences of electromagnetic radiation (EMR). Specific Absorption Rates (SARs) are used to define exposure limits in these guidelines (SAR) [1]. Procedures for evaluating this amount are defined by international standards. Type certification for wireless equipment now includes SAR measurements as an essential part of the procedure. It is, however, becoming increasingly difficult for the industry to carry out compliance testing processes due to the ever-increasing complexity and the wide range of intended usage conditions of communication devices. Due to the wide range of frequencies and communication modes available in 5G LTE, SAR test periods have increased significantly (Long Term Evolution).Standard SAR systems require roughly 60 hours (8 working days) to run 100 head and body SAR tests to determine compliance with, say, two LTE bands on a Smartphone [2]. It is not uncommon for type clearance procedures to need as much as five weeks of testing, spread out over two 8-hour shifts each day.
