TY - JOUR T1 - Planar bilayer metamaterial with left-handed transmission and negative refraction at microwave frequencies A1 - Cakmak, A.O. A1 - Guven, K. A1 - Ozbay, E. JA - Physica Status Solidi B Y1 - 2007 VL - 244 SP - 1188 EP - 1191 ER -