**Author: **Tkach Leonid

**Group: **РВ-31м

**Supervisor: **Zinchenko Maxim

**ELK: **Master

**Speciality: **8.05090201 Radioelectronic Devices and Facilities

**Summary: **Master dissertation devoted to issues considering the level of radiation of electromagnetic fields on diffusers with fractal geometry. Explanatory note occupies a volume of 128 p., Includes 45 figures, 18 tables, 144 formulas and 44 sources. It consists of an introduction, list of references, five chapters, conclusions, list of references and applications. In the master’s dissertation printed circuits and devices considered as diffusers of fractal geometry. A model сonductors PCB antenna structure as random stochastic fractal dendritic type. Made by modeling electrodynamic systems devices approximation of thin conductors and flat screens that take into account the calculation of the surface current induced excitation leading to cell model. As a mathematical basis is the method of integral equations written on the surface current density in conductors and conductive thin screens. The investigation of fractal antennas range from 2 to 18 GHz, which show that their work area frequency bandwidth is interleaved and relaxation. Bandwidth increases with increasing operating frequency of the antenna. In bandwidth excited some local areas active surface fractal antenna. The size and location of these areas depend on the frequency of the probe signal. Fractal antenna in certain frequency bands can provide enough high gain. Experimentally confirmed that the circuit boards in evaluating their EMC can be considered as fractal fertilizer.

**Keywords: **electromagnetic compatibility, the level of radiation of electromagnetic fields, statistical and deterministic approach

**The work consists of:** 116 pages of explanatory note and 1 appendix

**Explanatory note: **Full text

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