在离轴反射场景中,高斯向平顶光束的成型是由毫米波元表面的毫米波反射场景
Applied optics
|April 3, 2024
概括
这项研究引入了一种新的金属反射阵列,能够将100GHz的高斯波束塑造为平顶形状,用于毫米波成像. 紧的平面设计为梁塑形应用提供了进化解决方案.
科学领域:
- 电磁学和光学 电磁学和光学
- 天线理论和设计.
- 毫米波技术技术 毫米波技术
背景情况:
- 高斯光束在毫米波 (MMW) 应用中很常见,但通常需要根据特定的成像需求进行成型.
- 现有的光束造型器可能很复杂或不太适合离轴反射配置.
- 反射阵列为光束操纵提供了一个平面且可能更简单的替代方案.
研究的目的:
- 设计和验证一种金属反射阵列,用于将100GHz高斯波束成形为平顶形状.
- 为了证明反射阵列在MMW成像的轴外反射模式中的能力.
- 为了呈现一个紧的,易于制造的解决方案,用于梁形状.
主要方法:
- 一个1D反射阵列是使用相形状设计的,该相形状结合了几何光学 (GO) 和补偿,单元细胞尺寸是以一种方向量身定制的.
- 使用有限元法 (FEM) 计算散射场,并通过弗雷内尔衍射确定生成的光束.
- 使用类似的方法设计了一个2D反射阵列,使用全波模拟来分析生成的光束.
主要成果:
- 一维反射阵列的设计和分析作为二维概念的可行性研究.
- 2D反射阵成功地在离轴反射模式下生成了高质量的平顶光束.
- 模拟证实了拟议的相形状和单元细胞设计的有效性.
结论:
- 金属反射阵列是一种可行且有效的解决方案,用于在MMW应用中生成平顶光束.
- 拟议的设计在紧性,易于制造和在离轴反射场景中的性能方面具有优势.
- 这项工作呈现了MMW成像光束成形技术的进化进步.
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