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Information × Registration Number 0225U000184, (0121U100316) , R & D reports Title Ways to resolve the problem of elimination of extraneous solutions in the problems of motion parameter determination and plasma diagnostics by microwave methods popup.stage_title Розробка методу однозначного визначення власних частот біконічного резонатора з використанням методу частково перетинних областей. Head Zabolotnyi Petro I., Registration Date 07-01-2025 Organization Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine popup.description1 Development of physical foundations for resolving the phase ambiguity problem in three-probe microwave measurements of the displacement of mechanical objects and the linear electron density in plasma and the problem of unambiguous determination of biconical cavity eigenfrequencies by the overlapping domain decomposition method. popup.description2  The study is concerned with biconical cavity eigenfrequency determination methods. The aim of this stage is to develop a method for unambiguously determining the biconical cavity eigenfrequencies with the use of the overlapping domain decomposition method. Method: analytical calculation and computer simulation. It is shown that the equation in the eigenfrequencies may have extraneous solutions. A method is developed for extraneous solution elimination by solving the above equation for two values of the collocation surface radius and determining the eigenfrequencies as solutions common for both radii. A method is developed for determining the length of evanescent zones at the biconical cavity ends with moderate computational effort. The results may be used as informational and methodological support at the next research stage. Product Description popup.authors Horiev Mykola B. Doronin Oleksii V. Doiar Olha P. Zabolotnyi Petro I. Kodzhespirova Inna F. Mamachuk Valerii M. popup.nrat_date 2025-01-07 Close