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Information × Registration Number 0306U003407, 0105U000707 , R & D reports Title Investigation of electromagnetic wave and nonstationary fields diffraction on the regular and irregular nonuniformites in waveguide structures popup.stage_title Збудження і випроміінювання електромагнітних полів неоднорідностями у хвилеведучих і хвилеводно-резонаторних структурах Head Gorobets N., Katrich V., Registration Date 29-03-2006 Organization Kharkov National University named after V.N.Karazin popup.description2 The investigation subject: electromagnetic fields, diffraction phenomena and wave processes in the case of scattering the waveguide type waves with single slot nonuniformities, arrays of ones, open ends of coaxial and circular waveguides. The investigation goal: solving actual problem of impoving, developing and constructive synsthesis of microwave band element base of the modern radioelectronic systems, their miniaturization and the electromagnetic compatibility on the base of fundamental investigations of exciting, scattering and radiating electromagnetic waves and nonstationary fields with nonuniformities in waveguiding and waveguide-resonator structures; exposing new regularities of an influence of electrophysical and geometrical parameters and properties of nonuniformities and waveguiding structures on forming spatial-and-time, energy, frequency and polarization characteristics of scattered and radiated fields. The techniques of investigations are the theoretical researches, computer analysis, andexperiment. The problem of exciting the rectangular waveguide with irregular slot was considered. Electrodynamic characteristics of slot radiators cut in walls of singlemode and multimode rectangular waveguides in the case of tilling the waveguide and slot with a dielectric. By the induced magnetomotive forces method with using basis function the following resonator slot structures were studied: a) system of transmitting resonators coupled with help of resonance slot diaphragms and situated in the rectangular waveguide; b) resonance diaphragm-resonator-slot; c) two transverse slots-transmitting resonator-radiating slot. Transverse slots cut in the exterior conductor of a coaxial line was considered. The problem of radiation from open end of rectangular waveguide or pyramidal horn was solved. The radiation problem of the open rectangular waveguide end excited with a nonstationary source was solved by the modal basis method in the time domen. The method of decreasing the pattern main lobe width of the transverse radiation rarefied antenna arrays through their situation of one over other. ELECTROMAGNETIC WAVES, DIFFRACTION, RADIATOR, WAVEGUIDE-SLOT RADIATOR, WAVEGUIDE, PATTERN Conditions of the report acquisition: by contract. Address: Kharkov National University, 4 Svoboda sq., Kharkov, 61077, Ukraine Product Description popup.authors popup.nrat_date 2020-04-02 Close