文中讨论了地球物理勘探中的随钻测量电磁传输信道激励方式及物理模型；应用改进的等效传输线法与电极法，研究了影响地面电极检测电压的信道参数，给出了随钻电磁信道最人可测深度与地层电阻率、工作频率及井场干扰噪声的关系。与实测数据比较表明，所用理论模型能较好地预测随钻电磁信道的主要特性。

An analytical technique, called the scattering matrix method, is developed to analyze the scattering of a plane wave from a nonuniform ferrite cylinder. It is proved that the derived formulas for nonuniform ferrite cylinders can be degenerated to the formulas for uniform ferrite cylinders published in the literature. The characteristics of scattering by ferrite cylinders with a linear profile are investigated versus applied magnetic fields and wave frequencies.

Scattering of a plane wave with linear polarization by a chiral-coating conducting sphere is presented. The expressions for the expansion coefficients of scattered fields and internal fields are obtained. The achiral-coating and the bare sphere limiting cases for these formulas are examined. The monostatic and bistatic radar cross-section (RCS) for three different chiral media: a lossless dielectric chirality, a loss dielectric chirality and a loss magnetic chirality are shown.

The propagation properties of a plasma dielectric waveguide immersed in an external magnetic field are presented. The field components' expressions, eigenvalues and characteristic equations have been obtained. The variations of the propagation properties with plasma parameters, external magnetic field and frequency are discussed in detail on the basis of the method of separation of variables combined with the technique of Muller's calculating roots.