Article(id=1154065849473290568, tenantId=1146029695717560320, journalId=1146119989267898375, issueId=1149298855528714458, articleNumber=null, orderNo=null, doi=10.7654/j.issn.2097-1974.20250114, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1732118400000, receivedDateStr=2024-11-21, revisedDate=1734969600000, revisedDateStr=2024-12-24, acceptedDate=null, acceptedDateStr=null, onlineDate=1753080340020, onlineDateStr=2025-07-21, pubDate=1740412800000, pubDateStr=2025-02-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753080340020, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753080340020, creator=13701087609, updateTime=1753080340020, updator=13701087609, issue=Issue{id=1149298855528714458, tenantId=1146029695717560320, journalId=1146119989267898375, year='2025', volume='48', issue='1', pageStart='1', pageEnd='106', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1751943800098, creator=13701087609, updateTime=1754905336149, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1161720438087307694, tenantId=1146029695717560320, journalId=1146119989267898375, issueId=1149298855528714458, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1161720438087307695, tenantId=1146029695717560320, journalId=1146119989267898375, issueId=1149298855528714458, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=98, endPage=106, ext={EN=ArticleExt(id=1154065849888526665, articleId=1154065849473290568, tenantId=1146029695717560320, journalId=1146119989267898375, language=EN, title=A New Type of Combined Jammer Design Against Bistatic Radar, columnId=1154065845975244968, journalTitle=Missiles and Space Vehicles, columnName=Offensive and Defensive Counter Techniques, runingTitle=null, highlight=null, articleAbstract=

Bistatic radar is widely used in military field by virtue of its good anti-jamming ability and accurate detection and identification ability, and how to effectively jam this transceiver-split radar system has become a current research hotspot. Typical jammers have large fluctuations of bistatic RCS with angle change and weak bistatic scattering strength, which are not advantageous in countering bistatic radar. Therefore, a new type of combined jammer against bistatic radar is proposed by analyzing the bistatic scattering characteristics of four types of typical jammers. Afterwards, electromagnetic simulation calculations are carried out on the new combined jammer monomer/array of different bands, sizes and spacings to study the bistatic scattering characteristics under different parameters, and compared with typical jammers. The results show that the new combined jammer monomer/array has strong bistatic scattering strength and the fluctuation amplitude of its RCS with respect to angle is smaller, with good bistatic scattering characteristics, providing technical support for effectively jamming of bistatic radar.

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双站雷达凭借其良好的抗干扰能力和准确的探测识别能力在军事领域中被广泛应用,如何对这种收发分置的雷达系统实施有效干扰已成为当前的研究热点。典型干扰物的双站雷达截面(Radar Cross Section, RCS)随角度变化的波动幅度大,双站散射强度较弱,在对抗双站雷达方面不具优势。针对以上问题,通过分析4类典型干扰物的双站散射特性,提出一种对抗双站雷达的新型组合式干扰物,然后对不同波段、不同尺寸、不同间距的新型组合式干扰物单体/阵列进行电磁仿真计算,研究在不同参数下的双站散射特性,并与典型干扰物进行对比分析。研究结果表明,提出的新型组合式干扰物单体/阵列具有较强的双站散射强度,并且在双站角变化时,其RCS的波动幅度较小,具有良好的双站散射特性,为实现对双站雷达的有效干扰提供了技术支撑。

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辛蔚(2000-),女,硕士研究生,主要研究方向为目标特征控制。

刘鑫(1975–),女,研究员,主要研究方向为目标特征控制。

王伟东(1979—),男,研究员,主要研究方向为目标特征控制。

孟刚(1963—),男,研究员,主要研究方向为飞行器设计。

刘佳琪(1963—),男,研究员,主要研究方向为飞行器设计。

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王伟东(1979—),男,研究员,主要研究方向为目标特征控制。

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王伟东(1979—),男,研究员,主要研究方向为目标特征控制。

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刘佳琪(1963—),男,研究员,主要研究方向为飞行器设计。

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Aerospace Shanghai, 1992(3): 31-35., articleTitle=Bistatic radar scattering cross-section modeling of circular foil clouds, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1197269010904560065, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, xref=null, ext=[AuthorCompanyExt(id=1197269010912948674, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, companyId=1197269010904560065, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics,Beijing,100076), AuthorCompanyExt(id=1197269010921337283, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, companyId=1197269010904560065, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=试验物理与计算数学国家重点实验室,北京,100076)])], figs=[ArticleFig(id=1197269019741958633, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Fig. 1, caption=Bistatic scatter plots of four types of typical jammer monomers, figureFileSmall=QC/VKNDskIxYl51wd1uuiw==, figureFileBig=GvakdCcolacpFHwgTUb8PQ==, tableContent=null), ArticleFig(id=1197269019947479530, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=图1, caption=4类典型干扰物单体的双站散射, figureFileSmall=QC/VKNDskIxYl51wd1uuiw==, figureFileBig=GvakdCcolacpFHwgTUb8PQ==, tableContent=null), ArticleFig(id=1197269020492739051, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Fig. 2, caption=Variation curves of RCS with bistatic station angle for four types of typical jammer monomers, figureFileSmall=pGEU6fN5SEWOxjnYBhl8Iw==, figureFileBig=32KMWFd5fZSPuAbctue3dw==, 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figureFileBig=+LQJrBO1vMpAdaAyDAB9DA==, tableContent=null), ArticleFig(id=1197269023739130358, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=图7, caption=新型组合式干扰物结构, figureFileSmall=nzL0aGCp7NRjhBMghh0cBw==, figureFileBig=+LQJrBO1vMpAdaAyDAB9DA==, tableContent=null), ArticleFig(id=1197269023919485431, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Fig. 8, caption=Comparison of RCS with azimuth angle at different bistatic station angles for the new combined jammer monomer in C、X、Ku bands, figureFileSmall=3hD3vVd4YW4EVYH9NiLBrg==, figureFileBig=Mk+Lp9HSjpMyjbm11QLKpg==, tableContent=null), ArticleFig(id=1197269024162755064, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=图8, caption=新型组合式干扰物单体在$\mathrm{C}$$\mathrm{X}$$\mathrm{{Ku}}$3个波段下,不同双站角的$\mathrm{{RCS}}$值随方位角变化的对比, 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figureFileBig=9eqCRRLy92GECMgAdJgPGw==, tableContent=null), ArticleFig(id=1197269027966988805, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Tab. 1, caption=Structural parameters of the four types of jammer, figureFileSmall=null, figureFileBig=null, tableContent=
序号干扰物单体结构干扰物结构参数干扰物阵列结构
1
2
3
4
), ArticleFig(id=1197269028176704006, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=表1, caption=4类干扰物结构参数, figureFileSmall=null, figureFileBig=null, tableContent=
序号干扰物单体结构干扰物结构参数干扰物阵列结构
1
2
3
4
), ArticleFig(id=1197269028390613511, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Tab. 2, caption=Electromagnetic simulation parameters, figureFileSmall=null, figureFileBig=null, tableContent=
参数取值
雷达频率/GHz10
单体目标轴线尺寸/mm100
干扰物阵列数目/个5
干扰物阵列间距/mm75
双站角/(°)0~120,步进30
), ArticleFig(id=1197269028646466056, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=表2, caption=电磁仿真参数, figureFileSmall=null, figureFileBig=null, tableContent=
参数取值
雷达频率/GHz10
单体目标轴线尺寸/mm100
干扰物阵列数目/个5
干扰物阵列间距/mm75
双站角/(°)0~120,步进30
), ArticleFig(id=1197269028835209737, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Tab. 3, caption=Structural parameters and electromagnetic simulation parameter for the new combined jammer, figureFileSmall=null, figureFileBig=null, tableContent=
参数取值
圆片轴线长度/mm100
球体直径/mm25、50、75
阵列间距/mm50、75、100
雷达频率/GHz6、10、15
双站角/(°)0~120,步进30
), ArticleFig(id=1197269028910707210, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=表3, caption=新型组合式干扰物结构参数与电磁仿真参数设置, figureFileSmall=null, figureFileBig=null, tableContent=
参数取值
圆片轴线长度/mm100
球体直径/mm25、50、75
阵列间距/mm50、75、100
雷达频率/GHz6、10、15
双站角/(°)0~120,步进30
), ArticleFig(id=1197269028990398987, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Tab. 4, caption=The mean value of RCS and the maximum fluctuation amplitude of RCS at the bistatic station angles of five types of jammer monomer, figureFileSmall=null, figureFileBig=null, tableContent=
干扰物类型各双站角下的RCS均值/dB最大波动幅值/dB
${0}^{\circ }$${30}^{\circ }$${60}^{\circ }$${90}^{\circ }$${120}^{\circ }$
圆片-27.21-29.16-28.96-29.35-24.984.37
球体-21.10-21.02-21.45-19.88-24.324.44
双棱锥八面体角反-14.05-17.48-20.31-24.21-31.1717.12
圆形八面体角反-13.84-17.84-20.31-24.21-28.2714.43
新型干扰物-19.46-19.93-19.94-20.40-21.921.98
), ArticleFig(id=1197269029120422412, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=表4, caption=5类干扰物单体双站角下的RCS均值以及最大波动幅值, figureFileSmall=null, figureFileBig=null, tableContent=
干扰物类型各双站角下的RCS均值/dB最大波动幅值/dB
${0}^{\circ }$${30}^{\circ }$${60}^{\circ }$${90}^{\circ }$${120}^{\circ }$
圆片-27.21-29.16-28.96-29.35-24.984.37
球体-21.10-21.02-21.45-19.88-24.324.44
双棱锥八面体角反-14.05-17.48-20.31-24.21-31.1717.12
圆形八面体角反-13.84-17.84-20.31-24.21-28.2714.43
新型干扰物-19.46-19.93-19.94-20.40-21.921.98
), ArticleFig(id=1197269029367886349, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=EN, label=Tab. 5, caption=The mean value of RCS and the maximum fluctuation amplitude of RCS at the bistatic station angles of five types of jammer arrays, figureFileSmall=null, figureFileBig=null, tableContent=
干扰物类型各双站角下的RCS均值/dB最大波动幅值/dB
${0}^{\circ }$${30}^{\circ }$${60}^{\circ }$${90}^{\circ }$${120}^{\circ }$
圆片-27.21-28.50-28.96-29.36-24.984.38
球体-21.08-21.02-21.42-19.88-24.314.43
双棱锥八面体角反-14.05-17.48-22.21-24.38-31.1717.12
圆形八面体角反-13.82-17.84-20.31-24.21-28.2714.45
新型干扰物-19.46-19.93-19.94-20.40-21.922.46
), ArticleFig(id=1197269029535658510, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1154065849473290568, language=CN, label=表5, caption=5类干扰物阵列双站角下的RCS均值以及最大波动幅值, figureFileSmall=null, figureFileBig=null, tableContent=
干扰物类型各双站角下的RCS均值/dB最大波动幅值/dB
${0}^{\circ }$${30}^{\circ }$${60}^{\circ }$${90}^{\circ }$${120}^{\circ }$
圆片-27.21-28.50-28.96-29.36-24.984.38
球体-21.08-21.02-21.42-19.88-24.314.43
双棱锥八面体角反-14.05-17.48-22.21-24.38-31.1717.12
圆形八面体角反-13.82-17.84-20.31-24.21-28.2714.45
新型干扰物-19.46-19.93-19.94-20.40-21.922.46
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一种对抗双站雷达的新型组合式干扰物设计
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辛蔚 , 刘鑫 , 王伟东 , 孟刚 , 刘佳琪
导弹与航天运载技术(中英文) | 攻防对抗技术专栏 2025,48(1): 98-106
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导弹与航天运载技术(中英文) | 攻防对抗技术专栏 2025, 48(1): 98-106
一种对抗双站雷达的新型组合式干扰物设计
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辛蔚, 刘鑫, 王伟东, 孟刚, 刘佳琪
作者信息
  • 试验物理与计算数学国家重点实验室,北京,100076
  • 辛蔚(2000-),女,硕士研究生,主要研究方向为目标特征控制。

    刘鑫(1975–),女,研究员,主要研究方向为目标特征控制。

    王伟东(1979—),男,研究员,主要研究方向为目标特征控制。

    孟刚(1963—),男,研究员,主要研究方向为飞行器设计。

    刘佳琪(1963—),男,研究员,主要研究方向为飞行器设计。

A New Type of Combined Jammer Design Against Bistatic Radar
Wei XIN, Xin LIU, Weidong WANG, Gang MENG, Jiaqi LIU
Affiliations
  • National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics,Beijing,100076
出版时间: 2025-02-25 doi: 10.7654/j.issn.2097-1974.20250114
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双站雷达凭借其良好的抗干扰能力和准确的探测识别能力在军事领域中被广泛应用,如何对这种收发分置的雷达系统实施有效干扰已成为当前的研究热点。典型干扰物的双站雷达截面(Radar Cross Section, RCS)随角度变化的波动幅度大,双站散射强度较弱,在对抗双站雷达方面不具优势。针对以上问题,通过分析4类典型干扰物的双站散射特性,提出一种对抗双站雷达的新型组合式干扰物,然后对不同波段、不同尺寸、不同间距的新型组合式干扰物单体/阵列进行电磁仿真计算,研究在不同参数下的双站散射特性,并与典型干扰物进行对比分析。研究结果表明,提出的新型组合式干扰物单体/阵列具有较强的双站散射强度,并且在双站角变化时,其RCS的波动幅度较小,具有良好的双站散射特性,为实现对双站雷达的有效干扰提供了技术支撑。

双站雷达  /  组合式干扰物  /  散射特性  /  无源干扰  /  电磁仿真

Bistatic radar is widely used in military field by virtue of its good anti-jamming ability and accurate detection and identification ability, and how to effectively jam this transceiver-split radar system has become a current research hotspot. Typical jammers have large fluctuations of bistatic RCS with angle change and weak bistatic scattering strength, which are not advantageous in countering bistatic radar. Therefore, a new type of combined jammer against bistatic radar is proposed by analyzing the bistatic scattering characteristics of four types of typical jammers. Afterwards, electromagnetic simulation calculations are carried out on the new combined jammer monomer/array of different bands, sizes and spacings to study the bistatic scattering characteristics under different parameters, and compared with typical jammers. The results show that the new combined jammer monomer/array has strong bistatic scattering strength and the fluctuation amplitude of its RCS with respect to angle is smaller, with good bistatic scattering characteristics, providing technical support for effectively jamming of bistatic radar.

bistatic radar  /  combined jammer  /  scattering characteristics  /  passive jamming  /  electromagnetic simulation
辛蔚, 刘鑫, 王伟东, 孟刚, 刘佳琪. 一种对抗双站雷达的新型组合式干扰物设计. 导弹与航天运载技术(中英文), 2025 , 48 (1) : 98 -106 . DOI: 10.7654/j.issn.2097-1974.20250114
Wei XIN, Xin LIU, Weidong WANG, Gang MENG, Jiaqi LIU. A New Type of Combined Jammer Design Against Bistatic Radar[J]. Missiles and Space Vehicles, 2025 , 48 (1) : 98 -106 . DOI: 10.7654/j.issn.2097-1974.20250114
随着雷达技术的不断发展, 双站雷达凭借其定位精确、抗干扰能力强、多角度探测能力突出等特点[1-2],在军事等领域中被广泛应用。双站雷达和典型雷达有所不同, 其发射机和接收机分置于相距很远的基地,并且能够获取目标多个角度的双站散射信息[3-4],如何对这种收发分置的雷达系统进行有效干扰, 也成为雷达攻防对抗领域中的热点研究。
释放大量干扰物形成强烈散射从而对雷达系统形成压制干扰是一种常用的干扰手段。从干扰物的角度来说, 当双站雷达发射机照射干扰物时, 干扰物散射的回波被另一侧的接收机接收, 其电磁波的入射方向和散射方向不同, 所以需要考虑干扰物本身的双站散射特性。双站散射主要描述的是目标被电磁波照射时, 其散射方向指向辐射源以外方向的散射现象。目前对于目标的双站散射特性正在开展深入的研究。文献[5]以典型八面体角反射器为研究对象, 通过电磁计算和暗室测量对比分析了单个角反射器、角反射器阵列单/双基地雷达截面(Radar Cross Section, RCS)各类特性, 揭示了双基地雷达与角反射器之间的几何关系对角反射器RCS的影响规律。文献[6]通过固定双站角和旋转目标对不同双站角下目标的雷达散射截面进行了测试分析, 发现了其双站电磁散射的对称性、相似性和弱耦合性3大主要特性。文献[7]对圆形箔片形成的箔条云的双站散射特性进行研究, 建立了双站散射截面模型。上述文献主要对目标双站散射下的典型特征以及双站角变化对目标RCS的影响规律开展了研究, 但是在如何利用目标的双站散射特性来更好地对抗双站雷达方面的研究还不够深入。
想要有效对抗双站雷达, 必须释放大量的干扰物形成强烈散射, 从而在雷达接收机处形成强烈杂波, 干扰雷达对目标进行探测识别。这需要干扰物本身具有较大的双站散射强度, 并且还需要尽量减小干扰物双站散射强度随着双站角变化的波动幅度, 以确保在各个双站角下均能保持足够的散射效能。典型干扰物的双站RCS随角度变化的波动幅度大, 双站散射强度较弱, 在对抗双站雷达方面不具优势, 因此想要达到更好的双站雷达干扰效果, 对干扰物自身的双站散射特性有更高的要求。
本文通过计算分析4类典型干扰物双站散射特性, 提出了一种新型组合式干扰物, 然后对不同参数下的新型组合式干扰物单体/阵列进行电磁仿真计算, 研究其双站散射特性, 并与典型干扰物进行对比分析。
本文选取了4类结构对称的典型干扰物, 分别为: 圆片、球体、双棱锥八面体角反射器以及圆形八面体角反射器, 干扰物结构参数如表1所示。方位角定义为$\varphi$,取值范围是$0 \sim {360}^{\circ }$; 俯仰角定义为$\theta$, 取值范围是$0 \sim {180}^{\circ }$。此次电磁仿真,俯仰角$\theta$始终保持${0}^{\circ }$,双站角$\alpha$即为入射方位角与接收方位角角度之差,取值范围是$0 \sim {120}^{\circ }$。对于干扰物单体,中心轴线尺寸$D$均为${100}\mathrm{\;{mm}}$。对于干扰物阵列,采用5个相同尺寸、相同方向的目标,间隔均匀置于同一水平线上。
利用CST STUDIO SUITE电磁仿真软件对4类干扰物的双站RCS进行仿真计算, 采用的方法为积分方程法, 电磁仿真参数设置如表2所示。
图1为4类典型干扰物单体在双站角分别为${0}^{\circ }$${30}^{\circ }$${60}^{\circ }$${90}^{\circ }$${120}^{\circ }5$个角度下的RCS对比。图2为4类典型干扰物单体RCS随双站角的变化曲线。
图1a可以看出,圆片在垂直于双站角平分线方向上的RCS达到最大值, 而在其他方位角的RCS较小,相差${20}\mathrm{\;{dB}}$以上。这是由圆片的结构特性决定的, 根据圆片散射原理(见图3)可知, 当大部分电磁波以$\beta$角度入射到圆片平面时,会产生镜面散射, 此时电磁波的入射方向与散射方向关于平面法线对称,绝大部分回波都集中以$\pi -\beta$角度射出,所以当接收方正处于$\pi -\beta$时,回波强度达到最大,因此圆片在垂直于双站角平分线方向上的RCS达到最大值时, 在其他方向上的RCS较小。并且结合图2来看, 圆片的双站RCS均值随双站角变化的波动幅度不大, 但其整体的双站散射强度较小,仅为$-{29}\mathrm{\;{dB}}$左右,远低于其他3类干扰物。
根据图1b可看出,由于球体自身具有高度对称性,所以球体在每一双站角下的RCS值随方位角变化的波动幅度较小, 分布较为平均。结合图2来看, 球体整体的双站散射强度较大,平均可达到$-{22}\mathrm{\;{dB}}$,并且由球体散射原理(见图4)可以看出, 无论电磁波从哪个方向入射, 球体的散射均为全向均匀散射, 不存在散射集中在某些角度导致RCS出现尖峰的问题, 所以其双站RCS均值较为稳定, 随双站角变化的波动幅度较小,仅为${0.4}\mathrm{\;{dB}}$
从对抗双站雷达的角度来说,圆片的RCS均值随双站角变化的波动幅度不大, 但其整体的散射强度较小, 在对抗双站雷达时效果较差; 球体的双站散射强度较大, 且随双站角变化的RCS值较为稳定, 波动幅度小, 说明其双站散射特性在对抗双站雷达时具有一定优势; 两类角反射器随着双站角的增大, 双站散射强度显著下降, 说明两类角反射器双站散射的方向性较强, 在对抗双站雷达时不具优势。
为了进一步研究干扰物阵列结构在对抗双站雷达时的双站散射特性, 下面针对4类干扰物阵列的双站RCS开展研究,阵列中各单元之间的间距为${75}\mathrm{\;{mm}}$, 单元数量为5个。图5为双站角分别为${0}^{\circ }$${30}^{\circ }$${60}^{\circ }$${90}^{\circ }$${120}^{\circ }5$个角度下的RCS对比。图6为4类典型干扰物阵列RCS均值随双站角的变化曲线。
图5结合图1图6可以看出, 圆片阵列双站RCS分布与圆片单体的双站RCS分布较为相似, 在垂直于双站角平分线方向上的RCS达到最大值, 虽然圆片阵列的双站RCS均值随双站角变化的波动幅度不大, 但其整体的RCS均值较小; 球体阵列相较于球体单体来说, 其双站RCS值随方位角变化的波动幅度有所增大, 但其RCS均值随双站角的变化较为稳定; 对于两类角反阵列来说, 其RCS均值随着双站角的增大, RCS均值显著下降,最大可达$-{17}\mathrm{\;{dB}}$
根据上述对4类典型干扰物单体/阵列的电磁仿真结果分析, 圆片的RCS值随双站角变化的波动幅度较小, 但圆片平面会将电磁波集中在同一方向射出, 导致仅在某些方位角下的RCS值较为突出, 而整体的散射强度较小;球体的双站散射强度较大,而且随双站角和方位角变化的RCS值都较为稳定, 变化幅度较小, 所以考虑将小半径的球体与圆片相组合形成新型组合式干扰物。新型组合式干扰物减小了电磁波可照射到圆片平面的面积, 降低了某些方位角下较为突出的RCS值, 抬高了其他方位角下的RCS值, 同时, 球体的存在也保证了新型组合式干扰物双站RCS均值在具有较小的波动幅度的同时具有较大的双站散射强度。图7为新型组合式干扰物的结构。
再次利用CST STUDIO SUITE电磁仿真软件对新型组合式干扰物的双站RCS进行仿真计算, 电磁仿真参数设置如表3所示。
本节主要研究不同波段、不同球体尺寸下新型组合式干扰物单体的双站散射特性。
a)不同波段下的双站散射特性分析。
图8为新型组合式干扰物单体在$\mathrm{C}$$\mathrm{X}$$\mathrm{{Ku}}3$个波段下,不同双站角的RCS随方位角的变化对比。其中,圆片直径为${100}\mathrm{\;{mm}}$,球体直径为${50}\mathrm{\;{mm}}$图9为新型组合式干扰物单体在3个波段下, RCS均值随双站角的变化曲线。
图8可以看出, 在特定双站角下, 新型组合式干扰物单体RCS的波动幅度随着电磁波频率的增大而增大。当双站角不断增大时, 3个波段下的RCS波动幅度逐渐减小。结合图9来看, 随着电磁波频率的增大, 不同双站角下的RCS均值逐渐减小。而且随着双站角的增大, 3个波段下的RCS均值仍可保持较大值,可达到${22}\mathrm{\;{dB}}$左右,且较为稳定,变化幅度较小,仅为$1\mathrm{\;{dB}}$左右。因此,在3个常用波段下,新型组合式干扰物在对抗双站雷达方面均有较大优势。
b)不同球体尺寸下的双站散射特性分析。
图10为新型组合式干扰物单体在球体直径分别为${25}\mathrm{\;{mm}}$${50}\mathrm{\;{mm}}$${75}\mathrm{\;{mm}}$下,不同双站角的RCS值随方位角变化的对比图,其中电磁波频率为${10}\mathrm{{GHz}}$图11为新型组合式干扰物单体在不同球体尺寸下, RCS均值随双站角的变化曲线。
图10可以看出, 球体直径较小或者较大时, 在每一个双站角下的RCS值随方位角变化的波动幅度相对较小。当球体直径为${25}\mathrm{\;{mm}}$时,散射受圆片结构的影响更大, 大部分入射到圆片平面上的电磁波集中向同一个方向散射, 使得某些方位角下的RCS值较大, 而少部分入射到圆片边缘的电磁波散射很弱, 导致某些方位角下的RCS值较小, 因此在每一个双站角下的RCS值会产生一定的波动, 但波动幅度相对较小; 当球体直径为${75}\mathrm{\;{mm}}$时,散射受球体结构的影响更大, 大部分电磁波都射向球体部分, 由于球体具有高度对称性, 散射较为均匀, 所以在每一双站角下的RCS随方位角变化的波动幅度较小。同时结合图11来看, 新型组合式干扰物单体随着球体直径的增大, 不同双站角下的RCS均值也逐渐增大。
本节主要考虑不同的新型组合式干扰物阵列间距对双站散射特性的影响。图12为新型组合式干扰物阵列在间距分别为${50}\mathrm{\;{mm}}$${75}\mathrm{\;{mm}}$${100}\mathrm{\;{mm}}$下,不同双站角的RCS值随方位角变化的对比。图13为新型组合式干扰物阵列在不同间距下, RCS均值随双站角的变化曲线。
图12可以看出, 在特定双站角下, 新型组合式干扰物阵列RCS的波动幅度随着间距的增大而增大。结合图13来看, 随着双站角的增大, 3种间距下的干扰物阵列双站RCS均值波动幅度较小, 并且阵列间距对双站散射强度的影响不大, 3种间距下的RCS均值虽有波动,但基本稳定在$-{22}\mathrm{\;{dB}}$左右。因此在对抗双站雷达时, 新型组合式干扰物阵列的间距不宜过大, 在保证散射强度足够大时, 其RCS值随方位角的波动幅度较小。
对相同波段、相同尺寸、相同间距的典型干扰物单体/阵列与新型组合式干扰物单体/阵列的双站散射特性进行对比分析。其中电磁波频率为${10}\mathrm{{GHz}}$,单体中心轴线尺寸为${100}\mathrm{\;{mm}}$,阵列间距为${75}\mathrm{\;{mm}}$,新型干扰物中的球体直径为${75}\mathrm{\;{mm}}$图14为5类干扰物单体的RCS均值随双站角变化的曲线以及5类干扰物阵列的RCS均值随双站角变化的曲线。
表4为5类干扰物单体双站角下的RCS均值以及最大波动幅值,表5为5类干扰物阵列双站角下的RCS均值以及最大波动幅值。
图14结合表4~5可以看出,新型组合式干扰物单体/阵列相较于圆片, 双站散射强度大大提高, 可达到$-{20}\mathrm{\;{dB}}$左右;和球体相比,新型组合式干扰物单体/阵列的双站散射强度仅在双站角为${90}^{\circ }$附近时略低于球体, 在其他角度均大于球体, 而且其双站RCS波动幅度小于球体;和两类角反相比较来说, 随着双站角的不断增大, 新型组合式干扰物单体/阵列的双站RCS的波动幅度很小,仅为$2\mathrm{\;{dB}}$左右。根据以上仿真分析可以看出, 新型组合式干扰物单体/阵列均具有较大的双站散射强度, 并且双站RCS值较为稳定, 波动幅度较小, 具有良好的双站散射特性。因此, 新型组合式干扰物单体/阵列在对抗双站雷达方面具有较大优势。
本文针对典型干扰物在对抗双站雷达时的局限性, 提出了一种新型组合式干扰物。通过对不同波段、不同尺寸、不同间距的干扰物单体/阵列进行电磁仿真计算, 研究其在不同参数下的双站散射特性, 并与典型干扰物进行对比分析研究。结果表明, 这种新型组合式干扰物单体/阵列和典型干扰物相比,有较强的双站散射强度, 并且提高了双站RCS随角度变化的稳定程度, 具有良好的双站散射特性, 可为有效对抗双站雷达提供技术支撑。
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2025年第48卷第1期
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doi: 10.7654/j.issn.2097-1974.20250114
  • 接收时间:2024-11-21
  • 首发时间:2025-07-21
  • 出版时间:2025-02-25
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  • 收稿日期:2024-11-21
  • 修回日期:2024-12-24
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    试验物理与计算数学国家重点实验室,北京,100076
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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