基于电磁波的散射理论，研究了电磁平面波入射到准均匀各向异性介质的散射远场相干特性，得到了各向异性准均匀介质三维散射远场的光谱密度和光谱相干度的表达式。仿真结果表明，在各向异性准均匀介质散射势的每一个分量都是高斯相关的情况下，各向异性介质的光谱密度近似为对应的各向同性介质的光谱密度的平均，但是每个分量的权重不同，而且该权重是随着散射角度的变化而变化的。各向异性介质的光谱相干度与各向同性介质的光谱相干度则有非常大的差异，前者是分三个阶段振荡的，并且在某些散射角度范围内，呈现出与对应参量的后者几乎一致的现象。

Based on the scattering theory of electromagnetic wave, the electromagnetic scattering field generated by an anisotropic quasi-homogeneous medium is investigated. Then the analysis formulas for spectral density and spectral degree of coherence of the electromagnetic scattering field are derived. Simulation results show that when the scattering potential matrix of the anisotropic quasi-homogeneous medium is Gaussian-correlated, the normalized spectral density of the anisotropic medium is close to the average of the corresponding isotropic medium. But the weight of every component is not only different from each other but also changing as the scattering angle changes. The spectral degree of coherence of the anisotropic medium is greatly different from that of of its corresponding isotropic medium. The spectral degree of coherence of the anisotropic medium is oscillating as a function of the angle by three phases. And at some certain scattering angles, the spectral degree of coherence of the anisotropic medium is nearly the same as that of the corresponding isotropic medium.