We propose a new approach to design multi-bit coding metasurfaces (MSs) for broadband terahertz scattering reduction. An anisotropic graphene-based element with multiple reflection phase responses is modeled using the Method of Moments combined with the Generalized Equivalent Circuit's approach (MoM-GEC). The multi-level reflection phase response is adjusted by tuning the graphene chemical potential of each cell. Based on the coding metamaterials concept, 1-bit MS building blocks are nominated as "0" and "1" elements with opposite phase responses 0 • and 180 • , respectively. Therefore, the genetic algorithm (GA) is employed to search the optimal reflection phase matrix and determine the best coding metasurface layout. In order to validate our design strategy, 4 × 4, 8 × 8, 16 × 16, 32 × 32, and 64 × 64 arrays (MS) are modeled and show a great agreement with the desired low Radar Cross Section (RCS). In addition, 2-bit and 3-bit coding metasurfaces are then designed using two different sets of reflection phases {0
This Letter presents an electromagnetic modelling of an active integrated antenna array for 5G mobile communication. Here, the authors propose a functional method for active‐integrated antenna array synthesis, based on the method of moments combined with the generalised equivalent circuit (MoM‐GEC) in conjunction with a genetic algorithm for the synthesis of a 2D array with switched phase states. Their design strategy is applied to search for the optimal phase matrix with a directional beam and minimum side‐lobe level.
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