Review on Human Dosimetry for Radio-Frequency Exposure Above 6 GHz-International Exposure Standards

Two international guidelines/standards for human protection against electromagnetic fields are currently undergoing revision. The main revision would be on the metric and limits above the transition frequency; 3 GHz in IEEE C95.1 Standard and 10 GHz in International Commission on Non-Ionizing Radiation Protection. The frequency from the 3-10 GHz to 300 GHz includes the frequency band, which will be assigned for the fifth generation (5G) wireless communication system. Even though metrics and limits in the current guidelines/standards were different, they may be harmonized in part based on recent dosimetry research, as shown in draft guidelines/standard. This study reviews the rational for the undergoing revision, especially above 6 GHz from engineering viewpoint.