太赫兹频段下目标散射特性计算需考虑目标表面的粗糙特性和目标材料参数。在对粗糙目标几何建模时, 通常的精细面元剖分建模方法使得散射计算问题难以求解。提出确定性建模与统计性建模相结合的粗糙目标几何建模方法, 并且基于全波法提出了一种太赫兹频段可计算任意材料、任意粗糙凸体目标散射场的计算方法。通过与通用电磁计算软件计算结果的比较验证了该方法的准确性。

The influences of materials properties and surface roughness on the scattering computation of targets are considered at terahertz frequencies. For the geometric modeling of rough targets, the conventional fine facets splitting strategy will generate a large number of facets, making the solving of scattering calculation unaffordable. An efficient method combining deterministic modeling and statistical modeling is proposed. Then method based on Full-Wave Approach(FWA) for the scattering computation of arbitrary rough convex targets is realized at terahertz frequencies. The proposed scattering prediction method is verified by the simulations of standard targets comparing with the results of commercial electromagnetic computational software(FEKO).