Electromagnetic waves guided by parallel wires: With particular reference to the effect of the earth

A theory of the propagation of electromagnetic waves guided by a system of parallel wires is developed with particular reference to the effect of the earth, and is simplified so that it is identical in form with the elementary theory. Important general properties of a system of parallel conductors and their application to problems of propagation in power or communication circuits, or in a system of both types of circuits, derived by Professor Pleijel from the elementary theory, are mentioned together with several remarks of practical importance. The simplified theory leads to the same conclusions and, consequently, to the same applications. The simplified theory gives promise of successful application to such problems of propagation in transmission systems which heretofore as a rule have not been formulated with sufficient precision.