等离子鞘套包覆钝锥的双站极化散射特性

doi:10.7527/S1000-6893.2022.27722

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等离子鞘套包覆钝锥的双站极化散射特性

牛戈钊¹(), 刘彦明¹, 高澜², 张廷焜¹, 白博文¹

^1.西安电子科技大学空间科学与技术学院，西安 710126
^2.中国人民解放军63610部队，库尔勒 841000

收稿日期:2022-06-30 修回日期:2022-07-27 接受日期:2022-08-17 出版日期:2022-12-25 发布日期:2022-08-31
通讯作者: 牛戈钊 E-mail:gzniu@stu.xidian.edu.cn
基金资助:
国家自然科学基金(62171349);陕西省自然科学基础研究计划(2020JM-102)

Bistatic polarization scattering characteristic of plasma-sheath-covered blunt cone

Gezhao NIU¹(), Yanming LIU¹, Lan GAO², Tingkun ZHANG¹, Bowen BAI¹

^1.School of Aerospace Science and Technology，Xidian University，Xi’an 710126，China
^2.Unit 63601 of the Chinese People's Liberation Army，Korla 841000，China

Received:2022-06-30 Revised:2022-07-27 Accepted:2022-08-17 Online:2022-12-25 Published:2022-08-31
Contact: Gezhao NIU E-mail:gzniu@stu.xidian.edu.cn
Supported by:
National Natural Science Foundation of China(62171349);Natural Science Basic Research Plan in Shaanxi Province(2020JM-102)

摘要/Abstract

摘要：

高超声速目标在再入大气层过程中会产生覆盖在目标表面的等离子体鞘套，其对电磁波具有复杂的调制作用，并显著影响高超声速目标的散射特性。本文分析了等离子体鞘套包覆高超声速目标的双站极化散射特性。基于数值模拟的典型高度和速度下等离子鞘套参数，采用电流密度卷积法模拟了线极化平面电磁波与高超声速飞行器之间的相互作用过程。采用远场外推方法得到在俯仰角-90°~90°之间的双站极化散射分量（共极化和交叉极化）。通过对典型雷达工作频点下不同飞行和入射波条件下极化散射方向分布特性的分析，得到了飞行高度、入射角和极化模式对等离子鞘套包覆钝锥双站极化RCS的影响。

关键词: 等离子鞘套, 电磁散射特性, 电流密度卷积法, 雷达截面积, 交叉极化

Abstract:

The plasma sheath covering the vehicle’s surface will be generated during the reentry of the hypersonic vehicle， which has a complex modulation effect on the electromagnetic （EM） wave and significantly affects the scattering characteristics of the hypersonic vehicle. This paper analyzes the bistatic polarization scattering characteristics of a plasma-sheath-covered hypersonic vehicle. Based on the plasma sheath parameters at typical heights and velocities solved by numerical simulation， the current density convolution method was used to simulate the interaction between the linearly polarized plane EM wave and the hypersonic vehicle. The bistatic scattering components （co-polarization and cross-polarization） at the pitch angles of -90°-90° are obtained by the far-field extrapolation method. Through studying the direction distribution characteristics of polarization scattering under different conditions of flight and incident wave at typical radar operating frequency points， this paper analyzes the effects of flight height， incident angle and polarization mode on the bistatic polarization RCS of the plasma-sheath-covered blunt cone.

Key words: plasma sheath, electromagnetic scattering, current density convolution method, radar cross section, cross polarization

中图分类号:

牛戈钊, 刘彦明, 高澜, 张廷焜, 白博文. 等离子鞘套包覆钝锥的双站极化散射特性[J]. 航空学报, 2022, 43(S2): 97-105.

Gezhao NIU, Yanming LIU, Lan GAO, Tingkun ZHANG, Bowen BAI. Bistatic polarization scattering characteristic of plasma-sheath-covered blunt cone[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(S2): 97-105.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

飞行状态	高度/km	速度（Mach数）	迎角/（º）
1	50	23.2	0
2	60	24.3	0.5
3	70	25.8	0.6

入射角/（º）	频率/GHz	入射波极化方式	散射极化方式
0~50	3.3	垂直（V）	同极化（VV）
			交叉极化（VH）
		水平（H）	同极化（HH）
			交叉极化（HV）

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等离子鞘套包覆钝锥的双站极化散射特性

Bistatic polarization scattering characteristic of plasma-sheath-covered blunt cone

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