摘要
提出了一种快速有效的带罩天线的RCS计算方法，分析了带罩天线的宽带散射特性。该法基于面电磁流与空域子平面波等效的思想、结合散射场计算的Gordon公式，改进了带罩天线的物理光学法，并详细推导了有关的计算公式，有效解决了工程中大型带罩天线散射场的高效计算问题。通过数值仿真对算法的计算稳定性和效率做了分析，同改进之前相比，该法在保证相同计算精度的条件下，计算效率可以提高2～3个数量级。
An effective analysis technique for computing radar cross section of radome enclosed antennas is presented and the wide band scattering characteristics of an electric-large size radome enclosed antenna is analyzed in this paper. Under the assumption of local planar radome surface and the fact that inductive electric current on antenna surface and equivalent electric and magnetic currents on radome surface can be replaced by local plane wave fields in scattering computation, the new technique introduced the Gordon formula into the physical optics method, hence greatly improved the computation efficiency. Numerical examples validated the accuracy and efficiency of the presented method, as well as the significant effects of radomes on the scattering of antennas.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第3期417-421,428,共6页
Chinese Journal of Radio Science
基金
航空基础科学基金(2006ZC53040)资助课题
