Numerical analysis of problems of self-action of electromagnetic waves in nonlinear wavequides and radiating systems

The investigation is concerned with electromagnetic waves in wavequides partially filled with nonlinear medium and antenna radiation field in plasma. The object of investigation is development of methods of solving the nonlinear wave equation and gaining of more profound knowledge about the physical processes taking place in the wavequides and antennas in plasma. In their studies the investigators have used computer-aided numerical simulation methods. The researchers have found solution to the nonlinear boundary-value problems, studied the hysteretic effects in the nonunidimensional structures and formation of waveguide channels in dense plasma, discovered autooscillations in the nonlinear bed, assessed the applicability of simple unimode simulators and analysed the influence of nonlinearity on the energetic characteristics of antennas and cones of coverage thereof. The investigators have developed new algorithm, programme and methods for evaluating the effect produced by plasma on the antenna performance. All have been promoted and the fact is supported by an appropriate promotion certificate. The obtained results may find application in such spheres as antenna engineering, design of super-high-frequency devices, radio and plasma physicsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio