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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Use of Model-Based Parameter Estimation for Fast RCS Computation of a Conducting Body of Revolution over a Frequency Band
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Use of Model-Based Parameter Estimation for Fast RCS Computation of a Conducting Body of Revolution over a Frequency Band

机译：基于模型的参数估计在频带上旋转导体的快速RCS计算中的应用

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Frequency-derivative information incorporated with model-based parameter estimation (MBPE) is used to obtain scattering from a perfectly conducting body of revolution (BOR). The electric field integral equation (EFIE) is solved using the method of moments (MoM) to obtain the surface current on the perfectly conducting body. Instead of computing the MoM solution using a pointwise approach, a rational function model is used to approximate the current as a function of frequency. The model coefficients are computed using both frequency and frequency-derivative information at one frequency in the band or alternatively two or more frequencies in the band. With the rotational symmetry of BOR, the computational cost can be significantly reduced compared to that of arbitrary three-dimensional (3-D) objects and more importantly scattering from an electrically large body can be obtained. Numerical results for various perfectly conducting bodies are presented. Results show that the MBPE provides excellent agreement with the pointwise approach over a limited frequency band. In addition, the MBPE performs well for predicting sharp resonances.
机译：结合了基于模型的参数估计（MBPE）的频率导数信息可用于从完美传导的旋转体（BOR）获得散射。使用矩量法（MoM）求解电场积分方程（EFIE），以获得理想导体上的表面电流。代替使用逐点方法计算MoM解决方案，而是使用有理函数模型来将电流近似为频率的函数。使用频带中一个频率或频带中两个或多个频率处的频率和频率导数信息来计算模型系数。与BOR的旋转对称性相比，与任意三维（3-D）对象相比，计算成本可以大大降低，并且更重要的是，可以从较大的电子体获得散射。给出了各种理想导体的数值结果。结果表明，MBPE在有限的频带上与逐点方法提供了极好的一致性。此外，MBPE在预测尖锐共振方面表现良好。

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