| 预测反射面天线馈源毁伤效应的混合算法 |
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| 引用本文： | 董涛,徐晓文.预测反射面天线馈源毁伤效应的混合算法[J].电波科学学报,2005,20(3):378-380,405. |
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| 作者姓名： | 董涛 徐晓文 |
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| 作者单位： | 北京理工大学电子工程系,北京,1000081;北京理工大学电子工程系,北京,1000081 |
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| 摘 要： | 提出了一种预测反射面天线系统在馈源毁伤状态下辐射特性的混合算法.采用时域有限差分法(FDTD)分析了波导开口辐射器馈源穿孔毁伤时的初级辐射特性,利用物理光学法(PO)和物理绕射理论(PTD)分析了反射面天线的次级辐射特性.并采用非场分裂式完全匹配层(UPML)吸收边界条件、共形网格(Conformalmesh)技术提高计算精度和效率,取得了良好的效果,充分验证了混合算法的有效性.
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| 关 键 词： | 毁伤效应 馈源 反射面天线 时域有限差分法 物理光学法 物理绕射理论 辐射特性 穿孔 |
| 文章编号： | 1005-0388(2005)03-0378-04 |
Hybrid method to predict damage effects of reflector antenna with a hole perforation on its feed |
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| Dong Tao,XU Xiao-wen.Hybrid method to predict damage effects of reflector antenna with a hole perforation on its feed[J].Chinese Journal of Radio Science,2005,20(3):378-380,405. |
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| Authors: | Dong Tao XU Xiao-wen |
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| Abstract: | A hybrid method is presented to predict the damage effects of the feed of reflector antenna system in this paper. The primary radiation characteristics of open-ended rectangular waveguide with a perforated hole on the broad wall are analyzed by finite difference time domain(FDTD) method and also the secondary radiation characteristics of the reflector antenna are analyzed by physical optics(PO) method and physical theory of diffraction (PTD).Some techniques, such as unsplit version of perfectly matched layer(UPML), conformal mesh(CFDTD) are used to improve the accuracy and efficiency. Numerical results indicate the availability of the hybrid method. |
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| Keywords: | damage effects feed reflector antenna FDTD PO PTD radiation characteristics hole perforation |
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