An RFID tag based on artificial magnetic conductors is here proposed to work close to metallic planes. The backscattered power is proved to be higher if we use an AMC surface to isolate the tag antenna from the metallic plane, enabling a good detection at the reader even in presence of metals.
Mateos Navarro, R. M., Gonzalez, J. M., Craeye, C., & Romeu, J. (2007). Backscattering measurement from a RFID tag based on artificial magnetic conductors. European Conference on Antennas and Propagation, EuCAP 2007, 4 pp. https://hdl.handle.net/2078.5/229735