REFLECTION SUPPRESSION IN CYLINDRICAL NEAR-FIELD ANTENNA MEASUREMENT SYSTEMS – CYLINDRICAL MARS
REFLECTION SUPPRESSION IN CYLINDRICAL NEAR-FIELD ANTENNA MEASUREMENT SYSTEMS – CYLINDRICAL MARS
复制标题
圆柱形近场天线测量系统中的反射抑制 – 圆柱形火星
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
T. Lam
中科院分区：
文献类型：
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作者：
F. Fernández;A. Núñez;C. Martínez;I. Krug;M. Cappozzo;I. Carrard;P. Rouget;S. Jiménez;Roser Granero;E. Penelo;J. Santamaría;T. Lam
天线测试范围内的反射通常是给定设施误差预算内测量误差的最大来源[1]。此前，一种名为数学吸收体反射抑制 (MARS) 的技术已在减少球形近场天线测量中的范围多径效应方面取得了相当大的成功 [2,3,4,5]。虽然本文提出的技术也是通用测量和后处理技术；独特的是，该技术适用于圆柱形近场天线测试范围。这里，后处理涉及对测量的现场数据的圆柱模式频谱进行分析，然后将其与滤波过程相结合以抑制不需要的散射信号。本文在介绍实际距离测量的初步结果之前，介绍了测量技术并描述了新颖的近场到远场变换算法。这些结果表明该技术的成功，光谱反射减少了约 10 至 20 dB（即测量环境中已知散射体的散射减少），这与现有的、可比较的球形 MARS 技术所获得的改进程度相当。
Reflections in antenna test ranges can often be the largest source of measurement error within the error budget of a given facility [1]. Previously, a technique named Mathematical Absorber Reflection Suppression (MARS) has been used with considerable success in reducing range multi-path effects in spherical near-field antenna measurements [2, 3, 4, 5]. Whilst the technique presented herein is also a general purpose measurement and postprocessing technique; uniquely, this technique is applicable to cylindrical near-field antenna test ranges. Here, the postprocessing involves the analysis of the cylindrical mode spectrum of the measured field data which is then combined with a filtering process to suppress undesirable scattered signals. This paper provides an introduction to the measurement technique and a description of the novel near-field to farfield transform algorithm before presenting preliminary results of actual range measurements. These results illustrate the success of the technique by showing a circa 10 to 20 dB reduction in spectral reflections (i.e. a reduction in the scattering from a known scatterer within the measurement environment) which is comparable to the degree of improvement attained with the pre-existing, comparable, spherical MARS technique.