In the designing of transmission lines,the conductor surface field strength is one of the restriction factors,in order to balance the charge and surface field of different phases,to increase the utilization ratio of conductors,and to reduce the investment,this paper introduces a new scheme that uses different conductors in border and middle phases.

The results show that the shape of the electric field intensity–resistivity curve resembles the reverse form of letter S.

The paper probed into the regular pattern how to steadly and reliably transmit the signal of mobile communication system in underground by the theory analysis of transmission of leakage electromagnetic field in underground and the measurement of the distribution of field intensity in entry.

With the project as a practical example,part of the detection curves and infrared radiation field intensity values obtained from infrared detection in the cross-section are analyzed in the paper.

To work out the solution to these problems, enhancing the field strength and Covering Rate,extending the distance in communication,improving the definition of voice are essential.

Applying the classical method,using anisotropic rectangular coordinates,this article educes the field strength expression by electrified cylindroid and cylindrical surface as well as infinite straight lead in linear anisotropic homogeneous dielectric.

The empirical formula for calculating the maximum electric field strength of the particle in a non uniform field is derived.