一种RCS近场测量中天线方向图补偿方法
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摘要
提出了一种近场单站RCS测量中补偿天线方向图效应的方法.基于多散射中心模型给出了考虑天线方向图效应的近场单站RCS回波模型,利用该模型改进了近远场变换算法,克服了传统近场变换算法要求全方向天线的限制.仿真与实验结果表明,近场外推结果与远场测量值很吻合,主瓣及第一、二副瓣误差基本得到了校正;有效消除了天线方向图效应,提高了近远场变换测量的准确性.
A method was presented to mitigate the errors from uncompensated antenna pattern effects in circular near-field monostatic radar measurements. Firstly, a near field signal model was formulated in the presence of an antenna pattern based on the same scattering approximation used in the isotropic situation. Then a modified version of the near field to far field was derived with this model, jumping the traces of multi direction antenna demanded in near field extrapolation. Numerical simulation and experiment results show that the technique can remove antenna pattern errors and improve the accuracy of the far field RCS patterns.
A method was presented to mitigate the errors from uncompensated antenna pattern effects in circular near-field monostatic radar measurements. Firstly, a near field signal model was formulated in the presence of an antenna pattern based on the same scattering approximation used in the isotropic situation. Then a modified version of the near field to far field was derived with this model, jumping the traces of multi direction antenna demanded in near field extrapolation. Numerical simulation and experiment results show that the technique can remove antenna pattern errors and improve the accuracy of the far field RCS patterns.
引文
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[2] 张红霞,张丽星,朱良成.飞行器雷达隐身技术发展综述[J].国际航空,2009(5):31-33.Zhang Hongxia,Zhang Lixin,Zhu Liangcheng.Development of aircraft stealth technologies[J].International Aviation,2009(5):31-33.(in Chinese)
[3] 阎满存,余勇,李家垒,等.飞行器雷达隐身性能测试评估技术进展[J].战术导弹技术,2015(2):33-36.Yan Mancun,Yu Yong,Li Jialei,et al.Development of testing and evaluating technique of the aircraft radar stealthy performance[J].Tactical Missile Technology,2015(2):33-36.(in Chinese)
[4] 陈文.隐身飞机的维修经验[J].国际航空,1999(3):58-60.Chen Wen.Stealth aircraft maintenance[J].International Aviation,1999(3):58-60.(in Chinese)
[5] 王瑞凤,杨宪江,张彦朴.解析武器装备的隐身问题[J].探测与控制学报,2008,30(B10):77-79.Wang Ruifeng,Yang Xianjiang,Zhang Yanpu.Analysis on stealth technology of weapon equipment[J].Journal of Detection&Control,2008,30(B10):77-79.(in Chinese)
[6] 杨亮,王亦菲,张彦素,等.雷达吸波涂层损伤及修复研究进展[J].新技术新工艺,2009(1):97-99.Yang Liang,Wang Yifei,Zhang Yanshu,et al.The repair technique and the damage of radar absorbing coatings and its research progress[J].New Technology & New Process,2009 (1):97-99.(in Chinese)
[7] 许占显.隐身飞机的质量探测与维修技术研究[J].航空维修与工程,2012(1):68-70.Xu Zhanxian.Quality detection and maintenance technology research for stealth aircraft[J].Aviation Maintenance & Engineering,2012(1):68-70.(in Chinese)
[8] 张麟兮,李南京,胡楚锋,等.雷达目标散射特性测试与成像诊断[M].北京:宇航出版社,2009:61-67.Zhang Lingxi,Li Nanjing,Hu Chufeng,et al.Radar target scattering characteristics measurement and image diagnostic[M].Beijing:China Astronautic Publishing House,2009:61-67.(in Chinese)
[9] 邢曙光,吕晓德,丁赤飚.基于柱面扫描近场成像的RCS测试方法研究[J].雷达学报,2015,4(2):172-177.Xing Shuguang,Lü Xiaode,Ding Chibiao.Research on radar cross section measurement based on near-field imaging of cylindrical scanning[J].Journal of Radars,2015,4(2):172-177.(in Chinese)
[10] 张晓玲,陈明领,廖可非,等.基于三维SAR成像的RCS近远场变换方法研究[J].电子与信息学报,2015,37(2):297-302.Zhang Xiaoling,Chen Mingling,Liao Kefei,et al.Research on methods of targets? RCS near-field-to-far-field transformation based on 3-D SAR imaging[J].Journal of Electronics & Information Technology,2015,37(2):297-302.(in Chinese)
[11] LaHaie I J.Overview of an image-based technique for predicting far field radar cross-section from near field measurements[J].IEEE Transactions on Antennas and Propagation,2003,45(6):159-169.
[12] Lahaie I J.Generalization of circular and linear image based NFFFT to off waterline collection [C]//Proc.of the 35th Annual Meeting of the Antenna Measurement Techniques Association.Newport:AMTA,2013:138-144.
[13] Osipov A,Kobayashi H,Suzuki H.An improved image-based circular near-field-to-far-field[J].IEEE Transactions on Antennas and Propagation,2013,61(2):989-993.
[14] Tulgar O,Arif E.An improved back projection method with image segmentation for far-field/near-field SAR imaging and RCS extraction[J].IEEE Transactions on Antennas and Propagation,2015,63(6):2572-2584.
[15] Odendaal J W,Joubert J .Radar cross section measurements using near-field radar imaging[J].IEEE Transactions on Instrumentation and Measurement,1996,45(6):948-954.
[16] 卢万铮.天线理论与技术[M].西安:西安电子科技大学出版社,2004.Lu Wanzheng.Antenna theory and technology[M].Xi?an:Xidian University Press,2004.(in Chinese)
[17] Jensen F.On the number of modes in spherical wave expansions[C]//Proc.of the 24th Annual Meeting of the Antenna Measurement Techniques Association (AMTA′04).Atlanta,GA:[s.n.],2004:489-494.
[18] 傅君眉 ,冯恩信.高等电磁理论[M].西安:西安交通大学出版社,2000.Fu Junmei,Feng Enxing.Advanced electromagnetic theory[M].Xi?an:Xi?an Jiaotong University Press,2000.(in Chinese)