The present work is the continuation of the investigations performed by the authors [1, 2] of the processes of the electromagnetic waves oscillations in different media.

Passing of the short pulses through the elements of the antenna-feeder devices (AFD) presents particular interest, when the pulse duration becomes commensurable with the characteristic times of setting the processes of the electromagnetic wave propagation in the long lines.

For the investigation of these processes the authors use the traditional parameters of the long line; R, L, C, G – line, corresponding to impedance, inductance, capacity, conductivity of the long line, predestining the functional purpose of the path elements.