Abstract：
The single-antenna technique proposed in this paper was developed for measuring the radar cross-section at near-field distances in a real environment, from reflection coefficient measurements on the antenna. The near-field radar cross-section is corrected with an analytical factor calculated as a ratio between the radar cross-section computed at far-field and near-field. The analytical correction factor takes into account the effects of the diffraction at the edges of the target at incidence angles higher than 20°. An improved, distance averaging technique is proposed to reduce the multipath propagation effects. A time-gating procedure is additionally used in order to better isolate the reflection from the target and to remove the real environment contributions. The method was successfully tested on a rectangular metallic plate as a target over a wide frequency band, at normal and oblique incidence angles; however, it might also work for arbitrarily shaped targets, because they can actually be divided into small rectangular patches.
摘要：
本文提出的单天线技术是为了在真实环境中测量近场距离的雷达横截面而开发的，从天线上的反射系数测量。使用分析因子对近场雷达横截面进行校正，该分析因子计算为在远场和近场计算的雷达横截面之间的比率。分析校正因子考虑了入射角大于20°时目标边缘处的衍射效应。一个改进的,距离平均技术被提出来减少多径传播的影响。附加地使用时间门控过程以便更好地将反射与目标隔离并且去除真实环境贡献。该方法成功地在矩形金属板上作为目标，在宽频段上进行了测试，在正常和倾斜入射角；然而，它也可能适用于任意形状的目标，因为它们实际上可以分成小的矩形块。
