Abstract
An all-dielectric polarization-dependent metamaterial consisting of polymer and graphite is presented based on an anisotropic reflectionless TM waveguide designed using impedance-tunable transformation-optics. The simple structure for the metamaterial is given by discretizing it into several pieces of meshed panels in which a series of special cells are configured by effective medium approximations. The simulated results show that the metamaterial exhibits different transmittance for TE and TM polarization at 0° and 45° incident angle from 2.8 to 5.2 GHz. A metamaterial sample is fabricated via a two-step approach involving the 3D printing of polylactic acid panels and a novel graphite tape mask filling technique of graphite powder. The measured transmittance of the sample is −0.5 dB for TM polarization from 2.8 to 5.2 GHz. For TE polarization it is, on average, −4 dB and −3 dB at 0° and 45° incident angle respectively.
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