Literature survey of meta lenses using 3D printers at mmwave 20 GHz, take any ieee paper or something which is relevant to this and make ppt on its design theory and application

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This survey explores 20 GHz 3D-printed metalenses, detailing their operating principles and comparing IEEE designs and fabrication methods. It covers performance metrics such as gain, bandwidth, and efficiency. The design theory section explains phase control with printed unit cells and analyzes a specific lens antenna design, including visualizations of geometry and simulation data. Additionally, it assesses applications in imaging, sensing, and communications, identifies challenges in...