Ultrashort Pulse Emitters Based on a Long Line

In this paper, we present the of theoretical calculation and experimental study results of ultrashort pulse emitters with radiating elements based on an oscillator and disk-cone antenna, the excitation source of which is current oscillations in a long line switched by a switch with short switching time τ. The temporal characteristics of the emission field and its spectrum are determined. Depending on parameter l /(cτ) ( l is the length of the vibrator arm), various emission modes are shown to be implemented that differ in frequency characteristics and the shape of the radiation pattern. The basic emission regularities are qualitatively explained based on the calculation of the spectrum of eigen oscillations (in the spectral region) and based on the summation of the contributions from elementary currents flowing over the emitter surface (in the time domain).