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Based on dispersion engineering of the electric dipoles, we design a tunable reflection-type phase modulator(PM) with constant group delay time(GDT). The PM is demonstrated a high coupling efficiency and good linear phase reflective response in 8.4–11.4GHz. The time-domain response is also analyzed, which presents a coherent result with frequency responses. The PM can be used to design achromatic...
In this paper, we proposed a type of all-dielectric metamaterial (ADM) with continues dielectric ceramics. The ceramics, possess high permitivity and low loss, are designed in fishnet shape. With this shape, continuous displacement currents are inspired inside high permitivity ceramics for the incident electromagnetic wave. Then, Lorentz type of electric and magnetic resonances are emerged simultaneously,...
In this letter, magnetless reciprocal metamaterials are used to realize the circulation performance in free space. The metamaterials we used in the paper are ideal phase gradient metasurfaces, which is realized by different materials with different index of refraction. The anomalous refraction feature of the phase gradient metasurface is utilized to realize circulation characteristics. In free space,...
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