Yu. G. Belov1, V. V. Biryukov2, I. A. Vorobyov3, V. A. Malakhov4, D. V. Obraztsova5, Yu. V. Raevskaya6, A. S. Raevsky7, V. V. Shcherbakov8
1–8 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 korgik.265265@gmail.com,
6 raevskaja.julija@yandex.ru, 7 raevsky_as@mail.ru, 8 sherbakovwv@gmail.com

Currently, work is continuing on the study of the terahertz range. In wireless communications, this range is interesting for transmitting large amounts of data over long distances. The main problem of using the terahertz range for building wireless communication systems is the low output power of radiation sources. Therefore, it is advisable to use antennas with a high gain in such systems. Such antennas include antennas built according to the Cassegrain scheme. This antenna design scheme allows you to obtain a narrow radiation pattern with a gain of at least 40 dB. Thus, it is of interest to consider a Cassegrain antenna at a frequency of 118 GHz with a gain of at least 55 dB and a minimum level of side lobes.

To achieve the required characteristics, it is necessary to consider various designs and choose the optimal scheme for building a two-mirror antenna. The most important element of the antenna is the irradiator. Therefore, it is necessary to consider the types of horns and their characteristics in order to achieve the necessary amplitude-phase distribution of the electromagnetic field in the opening of the main mirror. The calculation and analysis of the characteristics of the Cassegrain horns and antenna has been carried out using CAD.

The above antenna characteristics in the terahertz frequency range in the conditions of the Earth's atmosphere should provide wireless communication at a distance of several kilometers, and in outer space for several thousand kilometers.

Belov Yu.G., Biryukov V.V., Vorobyov I.A., Malakhov V.A., Obraztsova D.V., Raevskaya Yu.V., Raevsky A.S., Shcherbakov V.V. Cassegrain antenna at a frequency of 118 GHz for communication between artificial Earth satellites. Antennas. 2024. № 2. P. 61–74. DOI: https://doi.org/10.18127/j03209601-202402-07 (in Russian)

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