Metasurface Waveguide Leaky-Wave Antennas

Metasurfaces can be engineered to guide surface waves in a homogeneous path, where sub-wavelength size printed patches are etched on a grounded high-frequency laminate. When the homogeneity of the patches is compromised or it is inappropriately excited, leakage takes place. This effect can be exploited to design leaky-wave antennas, by introducing perturbations on the pattern so radiation occur in a controlled manner. The aim of this paper is to propose certain candidate antenna designs. The engineering method to derive effective refractive index is comprehensively investigated to guide and radiate surface waves at a centre operating frequency of 10GHz as a validation of the theory proposed