Two whole-body exposure systems for biological effect test of RF electromagnetic fields

This paper describes two whole-body exposure systems for biological effect tests of radio frequency (RF) electromagnetic fields. The first exposure system is designed at 2 GHz band to have a feature of circular polarization for simulating a variety of coupling with humans in daily environment. The second exposure system is designed to simulate a multiple-frequency exposure between 800 MHz and 5.5 GHz. In order to get an accurate evaluation on the exposure level for rats in the exposure systems, we developed a statistical analysis tool in our systems. We first took documentary photos of rat activity in the exposure box in a real time. Then we derived the frequency of rats staying in various positions in the exposure box. Using the stay frequency as a weighting factor, we can calculate the whole-body average SAR statistical characteristics during the exposure period. The developed systems and demonstrated performances have shown their high quality and convenience as an exposure system for the above biological effect tests.