Abstract
Context. The immunity of radio direction finders depends greatly on the parameters of their antenna-feeder systems and on the configurations of antenna arrays. Thus, the study of the effectiveness of the spatial-frequency selectivity of antenna arrays of various configurations is an urgent task.Objective. The aim of the article is to study the influence of parameters of the spatial-frequency selectivity of different configurations of antenna arrays on the noise immunity of correlation-interferometric direction finding.Method. The analytical and the experimental researches of the efficiency dependence of the spatial-frequency selectivity of the considered configurations of antenna arrays of their basic parameters were completed.Results. In the work the use of different kinds of configuration and efficiency of antenna arrays for correlative-interferometric direction finding was explored. The basic parameters of antenna arrays that affect the noise immunity of correlative-interferometric direction finders were determined. It is shown that with the improvement of selective parameters of antenna arrays, such as the level of minor lobes, the width of the main lobe, the coefficient of directional noise ratio and the coefficient of the noise width of the main lobe of the radiation pattern and with the constant number of radio channels the efficiency of configuration of antenna array of the direction finder will increase. The variant of estimation of effectiveness of spatial-frequency selectivity of configurations of antenna arrays was suggested, that counts quantitatively all main peculiarities of realization of their spatial and time-frequency path and determines their noise immunity.Conclusions. The comparative analysis of the effectiveness of possible configurations of antenna arrays showed that the configuration of the orthogonal linear antenna arrays has the significantly better performance and the perspective of use, which is 20dB bigger, comparing with a circular antenna array.
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