We report studies of Fano resonance in a double layer metamaterial consisting of two identical metallic square patch arrays separated by a dielectric spacer. The metallic patch arrays are arranged in mirror symmetry with respect to the dielectric spacer. It is shown that such a metamaterial can exhibit sharp Fano resonances. A good agreement is obtained between the experimental and simulation results for such a metamaterial fabricated on an FR4 substrate. The square patch based design is less sensitive to polarization due to its higher degree of symmetry than the metallic elements based on split rings in the previous work.

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