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Ac task cst microwave studio1/3/2023 The proposed method provides a smart tool to realize various functional devices and systems automatically. Two complicated functional metasurfaces with circularly- and elliptically-shaped radiation beams are realized by automatically designing 4-bit macro coding units, showing excellent performance of the automatic designs by software. To experimentally verify the performance, a coding metasurface is fabricated by automatically designing two digital 1-bit unit cells, which are arranged in array to constitute a periodic coding metasurface to generate the required four-beam radiations with specific directions. The apertures of the designed reflective metasurfaces are formed by arranging the macro coding units with certain coding sequence. By combining an optimization algorithm and commercial electromagnetic software, the digital patterns of the macro coding units are optimized to possess constant phase difference for the reflected waves. two types for 1-bit coding, four types for 2-bit coding, etc.), and each type of the macro coding units is formed by discretely random arrangement of micro coding units. In details, the macro coding units of metasurface are automatically divided into several types (e.g. The design procedure is completely automatic, controlled by a personal computer. We present a fully digital procedure of designing reflective coding metasurfaces to shape reflected electromagnetic waves.
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