V. M. Artyushenko1, V. I. Volovach2
1 Moscow State University of Geodesy and Cartography (Moscow, Russia)
2 Volga Region State University of Service (Toglyatti, Russia)
2 MIREA – Russian Technological University (Moscow, Russia)

1 artuschenko@mail.ru, 2 volovach.vi@mail.ru

An experimental study of the radar characteristics of objects should be carried out with sufficient accuracy to take into account the influence of the interaction of the receiving and transmitting antennas, the presence of background reflections from the underlying surface and other factors. At the same time, the widely used compensation method is difficult to use in the case of studying large-sized extended objects. In such cases, it is preferable to use a direct measurement method, taking into account the presence of an interfering signal, the cause of which is the interaction of the transmitting and receiving emitters of the radar measuring complex.

The purpose of the study is to assess the degree of interaction between the transmitting and receiving antennas of the radar measuring system and consider the possibility of reducing their coupling in order to implement a direct method for measuring the radar characteristics of extended objects.

It has been shown that it is possible to isolate the antennas of the radar measuring complex by using radar absorbent materials. The interference component caused by the interaction of emitters can be determined as a result of mathematical modeling and the solution of a two-dimensional diffraction problem by the method of integral equations. The latter, in turn, allows you to use the collocation method. The proposed mathematical model allows taking into account all diffraction effects. The diagram of the monostatic effective scattering surface of the test object was calculated. It has been shown that the accuracy of measurements of radar characteristics of objects depends on the quality of the radar absorbent material and its location between the irradiators. Optimum dimensions of the radar absorbent material have been determined.

The use of a direct measurement scheme makes it possible to obtain radar characteristics of large-sized objects. The justified use of radar absorbent materials allows to significantly improve the electromagnetic isolation of emitters, as well as to increase the sensitivity of the measuring complex.

Artyushenko V.M., Volovach V.I. Evaluation of the influence of electrodynamic interaction of transmitting and receiving radiators of antennas on accuracy of measurements of radar characteristics of objects // Antennas. 2026. № 4. P. 70–77. DOI: https://doi.org/ 10.18127/j03209601-202604-07

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