Improved Measurement Method With Distance Correction of the Near-Field Radar Cross Section

IF 3.7 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-17 DOI:10.1109/LAWP.2025.3530975

Lin Qin;En Li;Chong Gao;Jinshi Liu;Haoyu Wen;Hui Zhu;Yong Gao;Yunpeng Zhang;Chengyong Yu;Jiawei Long

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引用次数: 0

Abstract

Near-field radar cross section (RCS) measurement is an important method for determining the RCS of a target. For near-field RCS measurements, the distance between the target and the antenna is insufficient for far-field measurements. The far-field RCS of the target is derived from the near-field data based on a multiple scattering center model. Conventional algorithms make several approximate assumptions about the measurement distance, which results in the calculated far-field RCS being independent of the measurement distance, introducing unnecessary RCS measurement errors. We propose a near-field quasi-monostatic RCS measurement distance correction method. In addition, the components related to the measurement distance are separated and corrected in the near-field to far-field transformation (NF2FFT) algorithm. Finally, the method was used to calculate the RCS of a metal plate and a metal cylinder for the different distances in the simulation and practical measurement in X band. The final results show that the method reduces the average RCS error by 0.64 dB for a 500 mm × 100 mm × 4 mm metal plate at 2 m measurement distance in the X band, confirming the effectiveness of the proposed method.

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改进的近场雷达截面距离校正测量方法

近场雷达截面（RCS）测量是确定目标RCS的重要方法。对于近场RCS测量，目标与天线之间的距离不足以进行远场测量。目标的远场RCS是基于多散射中心模型从近场数据中得到的。传统算法对测量距离作了几个近似假设，导致计算的远场RCS与测量距离无关，从而引入了不必要的RCS测量误差。提出了一种近场准单站RCS测量距离校正方法。此外，在近场到远场变换（NF2FFT）算法中，对与测量距离相关的分量进行分离和校正。最后，将该方法应用于X波段模拟和实际测量中不同距离下金属板和金属圆柱的RCS计算。最终结果表明，该方法在X波段测量距离为2 m时，将500 mm × 100 mm × 4 mm金属板的平均RCS误差降低了0.64 dB，验证了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.