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An enhanced metamaterial absorber based on the circumscribed-cross resonator is introduced in this paper. The new structure is polarization-independent, due to the symmetry of its unit cell, and is proven efficient for the attenuation of obliquely incident waves. The absorption mechanism is thoroughly investigated and is found to be mainly related to the losses of the dielectric substrate. Furthermore,...
A new lumped model fully compatible with SPICE-like simulators is proposed in this work. The model is scalable, technology independent and can unify predict both capacitive and inductive coupling effects. It is validated up to 60 GHz by means of two commercial EM simulators.
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