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Information × Registration Number 0218U001097, 0117U004852 , R & D reports Title Optimization of electrodynamic characteristics of ultra-wideband antennas and their adaptation to the reguirements of production and exploitation popup.stage_title Head Berdnyk Serhiy, Registration Date 08-02-2018 Organization Kharkov National University named after V.N. Karazin popup.description2 The object of the study - the processes of electrical excitation, radiation and the formation of electromagnetic fields with broadband antenna arrays of axial and transverse radiation and processes of conduction currents in individual elements of the grid. The density of conduction currents in the elements of the antenna array and their effect on the processes of formation of currents of displacement in the near-zone radiation that provides effective radiation of electromagnetic energy and the formation of the amplitude-phase distribution and the pattern of the given configuration. The purpose of the work is to develop principles of design, calculation methods and technology for the production of both single broadband antennas and broadband antenna arrays with given electrodynamic and spatial-energy characteristics, as well as the creation of valid experimental models suitable for production and practical use. Development of small-sized broadband antennas and antenna arrays for military and civilian radio communication facilities using broadband and noise signals. Also, the goal is to develop antenna arrays with a reduced level of radiation in the near zone for use as environmentally friendly radio communication equipment and antenna-applicators for radio-introscopy devices. The main results and their novelty are: In the study, the properties of broadband antenna arrays consisting of combined emitters of electric and magnetic types with different capacitance-inductive properties, as well as antenna arrays based on ferroelectric emitters. The following results are obtained in these main directions: - Physical and mathematical models of small-sized, wide-band antennas and equidistant antenna arrays with a period of less than half the operating wavelength; - methods of formation of space-energy characteristics of radiation of small-sized broadband antenna arrays of axial radiation; - models and experimental samples of microstrip and dielectric emitters; - technical solutions for automatic coordination of the radiation system with feeder line. The manufactured prototypes, according to their characteristics and technical and economic indicators, exceed the foreign developments and have no analogues at the present time. Recommendations for using work results. The obtained results and recommendations can be used in the development of new types of antennas of different frequency dual purpose antennas and antennas with a significantly weakened reactive radiation zone, which significantly increases their environmental safety. Product Description popup.authors Карпов О.І. Катрич Г. Медвєдєв М. Пахаренко В. Хруслова Н. Ярмольчук С. popup.nrat_date 2020-04-02 Close