E .I. Nefyodov - Dr.Sc. (Phys.-Math.), Head Researcher of the Radiotechnic and Electronic Institute, RAS
Yu. M. Ermolaev - Ph.D. (Phys.-Math.), Leading Researcher of the Public «Corporation «Magratep», Fryazino
M. V. Smelov - Ph.D. (Eng.), Leading Researcher of the Public Corporation «Corporation «Сomet», Moscow

The article describes the results of experimental studies the processes of generation, distribution of knotted of electromagnetic waves in vacuum and, sea water and plasma. The knotted electromagnetic wave is created in the near zone of a wire of toric antenna in the form of a trefoil, from pentfoil and 15-foil knot. In a distant wave zone on the axis of symmetry of toric antenna beam is formed longitudinal components of the radiated electromagnetic waves in the form of woven into a topological braid lines of force of the electric and magnetic fields of the wave. The degree of twisting (or the curvature of torsion of these lines of force) knotted field of trefoil, pentfoil or 15-foil knot from to determine the concentration of power lines around the axis of the torus (field analogs of mechanical helical springs), that is, the value of the field strength of the longitudinal waves along the axis. For trefoil antenna measured relative decrease in the radiation power on the axis of the torus with increasing distance R between the transmitting and receiving antenna in the two times is 5 dB (a law reducing the power of the order of about 1/R2), from the pentfoil antenna the same value equal to 3 dB and from the 15-foil antenna the same value equal to 1.5 dB (a law reducing the power of the order of about 1/ R(2π/N)- where N= number of a foil). It is found that the radiation has not exponential law attenuation in conducting media, for example in sea water. Strengthening is experimentally revealed longitudinal knoted electromagnetic wave on 3 dB at increase in a distance R between transferring and reception antennas twice. Experiment was made with antennas in the form of a 15-foil in the pool with sea water of 80х90х160 in size (cm3). It is experimentally revealed that the radiation of a longitudinal electromagnetic wave capacity 1 kW at atmospheric creates pressure steady spherical plasmoid like a fireball with a diameter of 1 cm.