Linear two-wire transmission line coupling to an external electromagnetic field. I. Theory

The telegrapher's equations have been derived electrodynamically for the transmission line of two linear parallel conductors separated by a dielectric layer and excited by an electromagnetic field. The line coupling to a plane electromagnetic wave is illustrated for an arbitrary orientation of Poynting's vector and various polarization angles. The results are compared with the ones of other papers. The role of the magnetic field, while exciting the line, is clarified. The equations obtained in the paper are solved analytically in the case of the line excitation source being an electromagnetic pulse of arbitrary form.