Yu. G. Belov1, V. V. Biryukov2, I. A. Vorobyov3, V. A. Malakhov4, Yu. V. Raevskaya5, A. S. Raevsky6, V. V. Shcherbakov7, T. V. Kozhevnikova8, Yu. A. Murashova9
1–9 Nizhny Novgorod State Technical University n.a. R.E. Alekseev (Nizhny Novgorod, Russia)

1 bel266@nntu.ru, 2 birukovvv@mail.ru, 3 unihoc50@yandex.ru, 4 mr.vasmal@mail.ru, 5 raevskaja.julija@yandex.ru, 6 raevsky_as@mail.ru, 7 sherbakovwv@gmail.com, 8 physics@nntu.ru

For communication between artificial Earth satellites, the distance between which can reach several thousand kilometers, antennas with a high gain are required, in particular, the Cassegrain antenna can be used. The article studies the influence of design elements on the electrical parameters of the Cassegrain antenna. For a variant of the Cassegrain antenna design with an additional conical transition, its range properties have been studied, as well as the influence of the geometric dimensions of the antenna elements on the electrical characteristics. The influence of the inaccuracy of the Cassegrain antenna manufacture on the gain for the developed design has been considered. The influences of the subreflector position relative to the main mirror, the focal parameter, and the accuracy of the subreflector surface manufacture have been studied. High sensitivity of the antenna gain to the subreflector displacement (relative to the optimal position) both along and across the optical axis of the antenna has been discovered. The geometric dimensions of all the main antenna elements determining its electrical characteristics have been calculated, which allows for a detailed design of the antenna and its subsequent manufacture. The proposed design assumes that all antenna elements can be made of one material (aluminum), which is necessary for its use in conditions with sharp temperature changes. An assessment of the effect of the processing quality (roughness) of the metal surfaces of antenna elements interacting with the electromagnetic field on antenna losses has been made. The results of the work will be used in the design of antenna communication systems between artificial Earth satellites.

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