Abstract
A single-layer dual-band metasurface cloak for a conducting cylinder illuminated by TM waves is presented. The metasurface is designed with dual-resonance unit cells to fulfil the sheet impedances necessary for scattering cancelation at two frequency bands. The electrically thin reciprocal metasurface cloaking layer is wrapped around the conducting cylinder separated by a dielectric spacer. As an example, the dual-band cloaking of a conducting cylinder with radius of $0.1\lambda _{\mathrm {L}}$ ( $\lambda _{\mathrm {L}}$ is the wavelength in free space at 2 GHz), height of $2.1\lambda _{\mathrm {L}}$ and a spacer distance of $0.03\lambda _{\mathrm {L}}$ is verified. The simulation results show more than 10 and 7 dB reduction in total scattering width, with 5.2% and 4.2% of 5 dB reduction bandwidth, centered at 2 and 3 GHz, respectively. The design is validated experimentally at four bistatic angles.
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