Fast Fourier Transform preprocessing for accelerated plane wave based spherical near-field far-field transformation
Fast Fourier Transform preprocessing for accelerated plane wave based spherical near-field far-field transformation
复制标题
基于加速平面波的球面近场远场变换的快速傅立叶变换预处理
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Eibert
中科院分区：
文献类型：
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作者：
C. Schmidt;T. Laitinen;T. Eibert
近场测量和变换技术被广泛应用于表征天线的辐射方向图。球面近场测量已经被广泛研究，并且存在具有不同探头补偿能力和复杂性的各种技术。在这些技术适用于（几乎）任意探头和球面波平移的基础上，通过使用基于傅立叶变换的测量数据的预处理，已经获得了关键的计算松弛。本文表明，相同的基于傅立叶变换的预处理步骤可以与基于平面波的探头校正的近场-远场变换结合应用。通过快速傅立叶逆变换将探头信号的集合分成更小的子集。这些子问题可以以降低的总体复杂性来解决，并且还实现了完全的探针校正。
Near-field measurement and transformation techniques are widely applied to characterize the radiation pattern of antennas. Spherical near-field measurements have been researched widely and various techniques with different probe compensation capabilities and complexities exist. Among those techniques applicable for (almost) arbitrary probes and based on spherical wave translations, the crucial computational relaxations have been gained through the use of a Fourier Transform based preprocessing of the measurement data. It is shown in this paper that the same Fourier Transform based preprocessing step can be applied in conjunction with the plane wave based probe-corrected near-field far-field transformations. The collection of probe signals is split into smaller sub sets by an Inverse Fast Fourier Transform. These sub problems can be solved with a reduced overall complexity and also a full probe correction is achieved.