Safe wireless power transmission using low leakage 2D-communication sheet

In this paper, we present a new type of coupler which is applicable to low leakage two-dimensional communication (2DC) sheets. Our 2DC system can transfer signals and powers simultaneously by using microwaves which travels in a two-dimensional medium. The goal of this paper is supplying 1 W/cm power through the sheet safely. In this paper, the safeness is evaluated in terms of localized specific absorption rate (SAR), according to the International Commission on Non-Ionizing Radiation Protection (ICNIRP) Safety Guidelines. First of all, a low leakage 2DC sheet that satisfies above criteria is designed. Next, it is clarified that the problem is the conventional 2DC power transmission coupler cannot extract enough power from the low leakage sheet. As an alternative to the conventional coupler, we propose a coupler which has a capacitive reactance layer on its surface. Finally we present a measurement result which indicates that proposed system can transfer 0.54 W/cm power safely.