Matlab CST interfacing for metasurface unit cell and coding diffuse metasurface design

Abstract

This thesis explores the design and simulation of a coding diffusion metasurface to achieve wideband radar cross-section (RCS) reduction using MATLAB–CST interfacing. Inspired by the principle of phase cancellation through binary coding, the work focuses on the development of two distinct unit cells with a reflection phase difference of approximately 180° ± 37°, constructed on a dielectric substrate. These unit cells form the basis of an 8×8 metasurface array governed by a randomly generated binary matrix. The methodology involves automating unit cell modeling in CST Microwave Studio through MAT- LAB scripting and integrating the geometry into a single simulation environment. The results demonstrate successful phase-based scattering diffusion, with characteristic multi-lobe patterns confirming RCS suppression across a wide frequency band. This work contributes to the field of electromagnetic stealth and programmable metasurfaces by offering a complete modeling-to- simulation workflow capable of generating custom-coded designs with reduced specular reflections.