Investigations of the reaction of biologic tissue to external electromagnetic fields is becoming more and more important in modern day signal environment with its eveqirowing number of electromagnetic emissions, both intended (i.e. cellphones, WLAN-routers, microwave transmission lines) and unintended (i.e. power leakage from apertures in computer casing, magnetic fields from power lines, stray fields from inductive battery charging stations). However, fundamental properties of cell tissue combined with the characteristics of electromagnetic waves make experiments rather difficult, since a large variety of different test setups with a large number of samples have to be taken into consideration. This paper proposes a novel method which is very suitable for frequencies above 400 MHz, a band in which a lot of emissions can be found.