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Information × Registration Number 0223U000856, 0121U109883 , R & D reports Title Investigation of the transmitting and receiving electrodynamic structures of multipurpose radio-electronic systems popup.stage_title Head Nesterenko Mykhailo V., Доктор фізико-математичних наук Registration Date 20-01-2023 Organization V.N. Karazin Kharkiv National University popup.description2 The numerical-analytical solution of the problem in the thin-wire formulation for an impedance vibrator with local asymmetric excitation is presented. The analysis of the main electrodynamic characteristics of the antenna proves the prospects for the practical use of antennas of this type in smartphones and electronic gadgets. The solution to the problem of the emission of electromagnetic waves by a vibrator with surface impedance distributed along its length, placed over a perfectly conducting screen of finite dimensions, is also presented. A two-level iterative algorithm for the numerical solution of the system of state equations has been developed, which, in comparison with the traditional ones, expands the possibility of analyzing non-linear subcircuits of wireless energy transmission (WPE) systems. The convergence of the iterative processes of the upper and lower levels was studied. A modified upper-level iterative process is proposed, which has convergence for any parameters of linear and nonlinear subcircuits of the BPE system. To increase the efficiency of the algorithm, using the example of large-aperture rectennas, the methods of taking into account the specific properties of their linear subcircuits are substantiated. Electrodynamic modeling of the characteristics of the microstrip wrap-around antenna (reflection coefficient, amplitude and phase directional patterns) installed on a cylindrical object was carried out. According to the results of the optimization, a mock-up of the antenna was built for conducting experimental studies. A good agreement of simulation results with experimental data is shown. Transient characteristics of ultra-wideband (UWB) pulsed ferrite receiving antennas were studied using the finite difference method in the time domain. Dependences of parameters of transient characteristics on dispersion properties (namely, relaxation time of domains of ferrite material) were obtained. The effects of frame design, load resistance, and load Product Description popup.authors Antonenko Yevhenii O. Berdnyk Serhii L. Gomozov Andrey V. Hretskykh Dmytro V. Dumin Oleksandr M. Katrych Viktor О. Ogurtsova Tetiana M. Pochanin Gennady Р. popup.nrat_date 2023-01-20 Close