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A volumetric metamaterial lens exhibiting a negative refractive index (NRI) at C-band is designed and its free-space focusing properties are experimentally verified. The designed lens employs a multilayer geometry and its unit cells are loaded using metal–insulator–metal (MIM) capacitors and dual-arm spiral inductors in a biplanar configuration. These elements, although fully printed and without vias,...
We characterize an improved fully-printed biplanar volumetric negative-refractive-index transmission-line (NRI-TL) metamaterial lens, which utilizes new double dual-arm spiral inductors and metal-insulator-metal capacitors as loading elements. The structure exhibits a NRI property from 3.92 GHz to 4.57 GHz. At these frequencies, the structure is shown to be isotropic and possesses a small electrical...
A fully-printed biplanar design of a volumetric negative-refractive-index transmission-line (NRI-TL) metamaterial is presented. The proposed structure employs dual-arm spiral inductors providing stronger loading inductance and leading to better matching to free space, while still possessing a small electrical length of one-eighteenth of the operating free-space wavelength.
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