Induced Currents and Charges on Cylinders and Crossed Cylinders by an Electromagnetic Field.

摘要

An introduction is given to the problem of determining the distributions of surface current and charge on crossed metal structures, particularly tubular cylinders. Pertinent knowledge about distributions of current and charge induced in thin wires, crossed thin wires, and cross-sectionally large tubes is presented as a foundation for acquiring an understanding for currents and charges induced in crossed electrically thick cylinders. It is shown that a representation of the distribution of current along a conductor excited by an E-polarized plane wave in terms of the transverse Fourier components and suitable combinations of forced and resonant components offers an attractive, relatively simple approximation. Preliminary experimental investigation of crossed cylinders with ka = 1 indicates that the original standing-wave distributions of charge and current density are not greatly altered by the addition of the horizontal cylinder except in the vicinity of that member. OUtside this vicinity the general nature of the standing waves is not changed significantly with respect to their location but large changes in the relative distributions of amplitude can occur. (Author)