SAR computation in a real-sized car: Multi-exposure scenarios

In this study, investigations have been carried out into the variation of whole-body averaged SAR values for 4 humans (one driver + three passengers) inside a realistic real-sized car. Transmitting devices used in the simulations had multiple frequencies making it a multi-exposure environment. These devices (e.g. Bluetooth, Universal Mobile Telecommunications System (UMTS) and WiMax) use differing operating frequencies and can be used in semi-echoic environments such as cars, trains, planes, etc. Results showed that the whole-body averaged SAR is below exposure limits provided by international standards and guidelines when there is 1 of each transmitter present. The results also show the whole-body averaged SAR when 2 active transmitters are simultaneously in use. Computed values are shown to be within the ICNIRP recommended limits.