用MBPE快速计算三维导体RCS的频空特性
Applications of MBPE for RCS Fast Calculation of 3D PEC Objects
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摘要: 该文系统研究了MBPE技术求解三维理想导体雷达散射截面(RCS)的宽频带特性。通过把电流在感兴趣的频率点处采用泰勒级数或者Pade有理函数展开，来获得理想导体某频带范围内的电流，从而可求出宽带雷达散射截面。同时，该文还将有理逼近应用于RCS的空域和频域双内插。数值结果表明MBPE技术获得的结果与确切解在宽频带、大角度范围内吻合良好，计算效率大大提高。Abstract: An implementation of the Model Based Parameter Estimation(MBPE) tech-nique is presented for obtaining the RCS frequency response of arbitrarily shaped Perfect Electric Conductor (PEC) bodies. The electric current is expanded in a Taylor series or Pade rational function around the frequency of interest, thus the -scattering field is obtained over the bandwidth. Rational function fitting model is also used for the interpolation of RCS in both spatial domain and frequency domain. A good agreement can be seen between MBPE and the exact solution, and the computational burden is significantly reduced.
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Reddy C J. Application of model based parameter estimation for RCS frequency response calculations using method of moments. NASA/CR-1998-206951.[2]Rao S M, Wilton D R, Glisson A W. Electromagnetic scattering by surfaces of arbitrary shape.IEEE Trans. on AP, 1982, AP-30(3): 409-418.[3]Reddy C J. Application of AWE for RCS frequency response calculations using method of moments. NASA Contractor Report 4758, October 1996.Cockrell C R, Beck F B. Asymptotic Waveform Evaluation(AWE) technique for frequency domain electromagnetic analysis. NASA Technical Memorandum 110292, November 1996.[4]Werner D H, Allard R J. The simultaneous interpolation of antenna radiation patterns in both the spatial and frequency domains using modal-based parameter estimation. IEEE Trans. on AP., 2000, AP-48(3): 383-392. -
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