FIELD: radio engineering, communication. SUBSTANCE: high-voltage pulse generator has a dc high-voltage source, electrodes lying on both sides of a flat dielectric barrier which is capable of rotating; a flat electrode is tightly placed on the entire surface of one side of the dielectric barrier with possibility of rotating together with the barrier, connected to one terminal of the dc voltage source; a fixed electrode is tightly placed on part of the surface of the opposite side of the dielectric barrier with possibility of sliding on said surface, the fixed electrode being connected to the same terminal of the dc voltage source. Another fixed electrode is placed diametrically opposite on the same side of the barrier with spacing, the fixed electrode being connected the other terminal of the voltage source through a load. EFFECT: obtaining high-voltage pulses of nanosecond duration and high repetition frequency. 2 cl