Wireless power transmission inside reinforced concrete slab using a resonant antipodal Vivaldi antenna

In this paper the results of the investigation into wireless power transmission in a concrete slab reinforced by metal bars (rebars) are presented. For this purpose a two-antenna setup including a resonant antipodal Vivaldi antenna as a transmitting antenna and a resonant microstrip patch antenna as a receiving antenna embedded in the concrete slab are designed and applied at 2.45 GHz. The influence of the presence of the slab and rebars, and size of mesh period of rebars on the reflection and transmission coefficients of the slab is studied. It is shown that the proposed two-antenna setup can provide effective power transmission in the concrete slab if localization and polarization of antennas with respect to rebars are optimized.