Wireless Displacement Sensing Enabled by Metamaterial Probes for Remote Structural Health Monitoring. - Burak Ozbey; Emre Unal; Hatice Ertugrul; Ozgur Kurc; Christian M. Puttlitz; Vakur B. Erturk; Ayhan Altintas; Hilmi Volkan Demir (Sensors, 2014)