Microwave plasma slowing system for a plasma shutter comprising: - a waveguide-band transmission configured to interconnect the system with a generator, and configured to let waves from the generator into the plasma shutter, - a bridge band interconnected with the waveguide-band transmission, - two parallel band waistlines, interconnected by its one end with the bridge band, - where the band waistlines are flat plates, where one of its sides is provided with - tenons arranged side by side along the axis of the band waistlines with orientation in a such way, that the tenons arranged on the one side of the first band waistline are placed in turns between the tenons arranged on the one side of the second band waistline, characterized in, that - the band waistlines are provided at the other end by mutually separated lockable electromagnetic oscillators, where the position of the lockable electromagnetic oscillators defines an exact point of reflection of a waves to perform its maximal amplitude by count up of a direct and a reflected waves, - the band waistlines are broadened in the direction from the waveguide-band transmission and narrowed before the lockable electromagnetic oscillators, - and intended for leading the direct waves Y from the bridge band to the lockable electromagnetic oscillators;, - the tenons are mutually separated in distance λ B /2, where λ B is a longitude of the wave at the exit of the waveguide-band transmission, - and positioned in a path of the reflected waves Z, which is leading from the lockable electromagnetic oscillator; to the bridge band, - the bridge band is configured to split a coming wave to two identical waves shifted by 180°, where each one of the waves spreads on a different band waistline. - a waveguide-band transmission configured to interconnect the system with a generator, and configured to let waves from the generator into the plasma shutter, - a bridge band interconnected with the waveguide-band transmission, - two parallel band waistlines, interconnected by its one end with the bridge band, - where the band waistlines are flat plates, where one of its sides is provided with - tenons arranged side by side along the axis of the band waistlines with orientation in a such way, that the tenons arranged on the one side of the first band waistline are placed in turns between the tenons arranged on the one side of the second band waistline, - the band waistlines are provided at the other end by mutually separated lockable electromagnetic oscillators, where the position of the lockable electromagnetic oscillators defines an exact point of reflection of a waves to perform its maximal amplitude by count up of a direct and a reflected waves, - the band waistlines are broadened in the direction from the waveguide-band transmission and narrowed before the lockable electromagnetic oscillators, - and intended for leading the direct waves Y from the bridge band to the lockable electromagnetic oscillators;, - and intended for leading the direct waves Y from the bridge band to the lockable electromagnetic oscillators;, - the tenons are mutually separated in distance λ B /2, where λ B is a longitude of the wave at the exit of the waveguide-band transmission, - and positioned in a path of the reflected waves Z, which is leading from the lockable electromagnetic oscillator; to the bridge band, - and positioned in a path of the reflected waves Z, which is leading from the lockable electromagnetic oscillator; to the bridge band, - the bridge band is configured to split a coming wave to two identical waves shifted by 180°, where each one of the waves spreads on a different band waistline.