Toward Design of Electrically Large Array of Rectangular Waveguide-fed Metasurfaces

We present the design and analysis of waveguide-fed metasurfaces consisting of an array of rectangular waveguides and metamaterial radiators–electrically small irises–inserted into the top wall, with each rectangular waveguide being excited by a slotted waveguide attached to the bottom wall. The metasurface configuration offers advantages for constructing electrically large aperture antenna systems, necessitating an efficient approach for design and analysis. We propose an analytical model for the metasurface using the coupled dipole framework, which approximates individual radiators as polarizable dipoles and models their mutual interactions using the Green’s functions. The proposed model is verified through full-wave simulations and thus demonstrated as an effective method for metasurface design and analysis.