研究目的
To propose a novel design method of dual-band reflectarray using genetic algorithm (GA) to achieve desired reflection phases in two frequencies simultaneously with the same polarization.
研究成果
The proposed method successfully designs a dual-band reflectarray using GA and two-layer patches, achieving desired wave reflection directions at two frequencies simultaneously. This approach addresses the challenge of independent phase control in dual-frequency reflectarrays with the same polarization.
研究不足
The study focuses on simulation and theoretical design without physical prototype testing. The complexity of designing dual-frequency reflectarrays with the same polarization may limit practical implementation.
1：Experimental Design and Method Selection:
The study adopts genetic algorithm (GA) for optimizing the configuration of two-layer patches in a reflectarray to independently control reflection phases at two frequencies. Finite-difference time-domain (FDTD) method is used for analyzing reflection phases under periodic boundary conditions.
2：Sample Selection and Data Sources:
The reflectarray elements are designed with two-layer patches, where each patch is divided into n by n meshes. The presence or absence of metal in each mesh is represented by binary genes in GA.
3：List of Experimental Equipment and Materials:
The study involves simulation models and does not specify physical equipment.
4：Experimental Procedures and Operational Workflow:
The GA optimizes the patch configurations to achieve desired reflection phases at two frequencies. The cost function evaluates the difference between desired and calculated reflection phases.
5：Data Analysis Methods:
The reflection phases are analyzed using FDTD method, and the performance is evaluated based on the ability to direct waves at desired angles in both frequencies.
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