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The S-shaped resonator (a) can be transformed to a pair of asymmetric parallel metallic cut wires separated by a dielectric; (b) and (c) view in plane.
Schematic representing the unit cell of (a) S-shaped resonator, and (b) asymmetric cut wire pairs metamaterial arranged in a square lattice. [(c) and (d)] Computed effective , and .
Oblique incidence (15°, 30°, and 45°) in H-plane. (a)-(c) Computed and measured reflection and transmission coefficients. (d)-(f) Real part of effective index n.
Oblique incidence (15°, 30° and 45°) in E-plane. [(a)–(c)] Computed and measured reflection and transmission coefficients for the square lattice. [(d)–(f)] Computed reflection and transmission coefficients for the triangular lattice. The inset in (d) shows the triangular lattice.
Computed numerical and analytical diffraction threshold frequencies (GHz).
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