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Electric current pulses of nanosecond length and amplitude up to 300 kV traveling through a transmission line partially filled with a magnetically saturated ferrite demonstrate excitation of quasi-monochromatic oscillations at 0.7–2.5 GHz. The amplitude efficiency of this DC-to-RF conversion can reach 50%. The two-dimensional model used for numerical analysis of the non-linear electromagnetic effects...
Experimental results and data of numerical simulations are presented, concerning generation of wideband radio frequency (RF) oscillations in a nonlinear transmission line (NLTL) which contains a pre-magnetized core of ferrite material. Emphasis is made on the means for extracting the RF signal from the line, in order to radiate it into free space. Antennas of two types that can be used for the purpose...
The analysis of electromagnetic processes in electric circuit with the semiconductor converter is presented in the article. The mathematical model for the analysis of electromagnetic processes in the semiconductor converter with power width regulation of the output voltage is created. The problem of using the method multiple parametric modulation function is solved in the work.
The paper presents a procedure and results of a numerical simulation of a pulsed electromagnetic wave traveling through a coaxial transmission line, partially filled with a ferrite material and placed in a longitudinal magnetic field. The evolution of the pulsed signal is analyzed, especially in connection with generation of monochromatic oscillations. The dependences of their frequency and amplitude...
Features of impulse reflectometry using sub-nanoseconds pulses are considered. Impacts of non-uniformities in the system to the measured signal parameters are analyzed. An algorithm for observed data processing that takes into account the test signal envelope and numerous reflections originating in non-uniform system is proposed.
Features of impulse reflectometry of the sub-nanosecond range are considered. The influence of parameters of a probing signal in the ultrabroadband nonuniform systems on the results of measurements is analyzed. An algorithm of processing of measurement data that allows accounting of the shape of the probing signal and numerous reflections, originating from nonuniform systems, is proposed.
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