Gretskih D. Energy performances large aperture antennas-rectifiers at a not coaxial arrangement of transmiting and receiving apertures in a Fresnel zone

Object – transformation process by rectenna of incident microwave beam energy to a direct current; aim – to development the analysis methods of power characteristics for large aperture rectennas at not coaxial arrangement in a Fresnel region of receiving and transmitting apertures of wireless power transfer (WPT) systems; methods – the general theory of antennas and antennas with nonlinear elements, microwave circuit theory, and methods of numerical and mathematical modeling; results – the analysis methods of power parameters for large aperture rectennas in Fresnel region are developed taking into account influence of aperture excitation asymmetry; recommendations to improve schematic design of a millimetric wave band rectennas are developed; innovation – to pioneer the saluted problem of power characteristic definition for large aperture rectenna systems (LARS) both on the basic frequency, and on harmonic frequencies is solved depending on degree of WET aperture misalignment at invariable GPD of the transmitting antenna; proposed approximate model of the resiver-rectifier element in the form of rectenna periodicity cells which takes into account influence of Shottki diode case parasitic elements and loss resistance of it and in comparison with existing models significally are simplified with the solution of a problem to choice rational structure of LARS; the idea to increase resulting efficiency of WET system is offered; level – the obtained results are used in the Kharkov state regional scientific and technical center on technical protection of the information, training process in KNURE; usage sphere – antenna farm and branch scientific research institutes engaged in research of up to date space power facilities.