Simulation and Measurement of Body Absorption for 5G/6G Frequency Bands

Sammanfattning: For the future implementation of high speed communication,safety remains one of the main concerns. To ensurethe safety of new applications, specifically the new 5G antennas,it is crucial to know that they will not cause any harm to thehuman body. There are a few ways to test how safe a systemusing high frequency radiation is but the industry standard is byusing the Specific Absorption Rate (SAR). The SAR is directlycorrelated to the initial temperature rise in the volume exposedto radiation which is what the method used in this report is basedon. The temperature rise in a skin-like phantom due to 5 GHzexposure was recorded using an IR-camera, which in turn wasused to calculate the SAR. The purpose of this report was to testif this method is a valid way of obtaining the peak surface SAR.It was concluded that the method is valid but there are someuncertainties in regards to abstracting the method to far-fieldexposure for our considered frequency. The SAR value that isachieved in this report is 333.4 W/Kg which is high in relationto the SAR-limits in IEEE guidelines, although the set up is notsupposed to reflect a realistic use of the antenna. This is due tothe fact that the waveguide in the setup is close to measurementsample, and has a higher intensity than is to be expected fromreal world applications. The method may be applicable for farfieldexposure with a higher frequency as that would concentratethe measurable heat to the surface of the measurement sampleand would also carry more energy by default.