复杂地物背景角域后向散射分布特性研究
Characteristics of Angular Domain Backscatter Distribution in Complex Ground Background
田博 1何海军 1钟海超 1李铁1
作者信息
- 1. 机电动态控制重点实验室,陕西西安 710065;中国兵器工业集团第二一二研究所,陕西西安 710065
- 折叠
摘要
针对采用平均后向散射系数进行对地空炸毫米波引信回波仿真时,因照射区域内入射角度散布较大造成仿真精度不足的问题,对复杂地物背景后向散射特性测试的远场条件进行了讨论,修正了复杂地物背景毫米波近场测试远场条件表达式,提出一种针对引信对地探测的复杂地物背景角域后向散射分布建模方法,构建基于实测数据优化的土耕地、水泥地等背景角域后向散射场,分析其对引信探测响应回波的影响.仿真结果表明,接近垂直入射情况下与传统乌拉比模型比较一致性较好,接近水平入射情况下比乌拉比模型后向散射系数小2～4 dB.利用该引信回波算法提高了毫米波引信探测仿真精度,可为对地空炸毫米波引信探测器设计提供数据支撑.
Abstract
In order to solve the problem of insufficient simulation accuracy caused by the large scattering angle of the incident angle in the irradiation area when using the average backscattering coefficient to simulation the echo of enemy air blast millimeter wave fuzes,the far-field conditions for testing the backscattering characteris-tics of complex ground backgrounds were discussed,and the far-field condition expression for millimeter wave near-field tasting of complex ground backgrounds were modified.Then,a complex ground background angle do-main backscatter distribution model for ground fuze detection was proposed.Based on the measured data,the optimized backscattering field in the soil cultivated land,cement land and so on were constructed,and its influ-ence on the response echo of fuze detection was analyzed.The simulation results showed that the proposed mod-el had high consistency with the traditional Ulaby model in the case of near vertical incidence.The backscatter coefficient was 2～4 dB lower than that of the Ulaby model under near horizontal incidence conditions.The sim-ulation accuracy of millimeter wave fuze detection was improved by using the fuze echo algorithm of this model,which could provide data support for the design of millimeter wave fuze detector for ground-to-air explosion.
关键词
地物后向散射/对地空炸引信/角域后向散射系数/散射分布函数/仿真Key words
backscattering of ground/ground-to-air explosion fuze/angular domain backscatter coefficient/scattering distribution function/simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据