Line-defect magneto-inductive waveguides and waveguide components

We study theoretically magneto-inductive waveguides made by defect lines in meta-material surfaces that comprise coupled split-ring resonators. The defects are introduced by changing the resonant frequency of the rings. We derive the wave dispersion relation and show how its properties depend on the sign and the strength of the inter-element coupling and the relationship between the resonant frequencies. We also demonstrate wave propagation along a 90-degree waveguide bend. The results show potential for novel planar magneto-inductive components.