3-D Shaping of a Focused Aperture in the Near Field
3-D Shaping of a Focused Aperture in the Near Field
复制标题
DOI：
10.1109/tap.2016.2618846
复制
发表时间：
2016-11
影响因子：
5.7
通讯作者：
I. Iliopoulos;M. Casaletti;R. Sauleau;P. Pouliguen;P. Potier;M. Ettorre
中科院分区：
文献类型：
--
作者：
I. Iliopoulos;M. Casaletti;R. Sauleau;P. Pouliguen;P. Potier;M. Ettorre
近场操控是电磁学中一个极具挑战性的课题，具有重要的应用价值。在本文中，我们开发了一种算法，能够根据给定的规格在三维域中整形核函数。该算法基于集合论方法和前后迭代传播方案。后者使用快速傅立叶变换(FFT)实现，减少了所需的计算时间。该算法被应用于焦点整形场景。在这种情况下，实现了对所产生的辐射的焦深、光斑直径和旁瓣电平的完全控制。特别地，所提出的方法被成功地应用于在30λ的12 GHz范围内控制辐射孔径的法向分量。导出的口径场分布由径向线缝隙天线(RLSA)通过内部矩量法(MOM)代码合成。核磁共振测量验证了所提出的方法和原型的有效性。
The manipulation of the near-field (NF) is a challenging topic in electromagnetics, carrying essential importance for several applications. In this paper, we develop an algorithm capable of shaping the NF in 3-D domains according to given specifications. The algorithm is based on a set theoretic approach and a front-and-back iterative propagation scheme. The latter is realized using fast Fourier transforms (FFT), reducing the required computational time. The algorithm is applied on a focal shaping scenario. In this case, a full control of the depth of focus, spot diameter, and sidelobe level of the generated radiation is achieved. In particular, the proposed procedure is successfully adopted to control the normal component of a radiating aperture over a range of 12λ at 30 GHz. The derived aperture field distribution is then synthesized by a radial line slot antenna (RLSA) by means of an in-house method of moments (MoM) code. NF measurements have validated the proposed approach and prototype.