Aleksey N. Kosmynin’s scientific contributions

Изобретение относится к антенной технике и служит для приема и передачи электромагнитных волн, в частности, в системах связи, радиолокации и других радиотехнических системах. Техническим результатом является упрощение конструкции сканирующей антенны, и улучшение гальванической развязки между цепями управления и СВЧ сигналом. Результат достигается тем, что предложена сканирующая антенна, включающая пассивную часть, содержащую модулированную импедансную метаповерхность, по крайней мере один фидер, возбуждающий бегущую поверхностную волну, проводящий экран, отличающаяся тем, что антенна дополнительно включает в себя активную часть, расположенную под проводящим экраном и выполненную с возможностью создания управляющего магнитного поля, а пассивная часть антенны содержит материал с изменяемой магнитной проницаемостью. Изобретение относится к антенной технике и предназначено для приема и передачи электромагнитных волн. Устройство может быть использовано в системах связи, радиолокации и других радиотехнических системах.

In this paper, we propose a novel method for synthesizing a multibeam metasurface antenna (MSA) for use in a space application - a payload component of a small satellite as part of a low Earth orbit (LEO) satellite communication constellation. MSA is synthesized using the holographic technique with a divergent phase distribution. Using this method, a low-cost multi-beam Ku-band antenna with seven flattened beams is developed. The results of the numerical simulation and experimental study of the proposed seven-beam MSA were presented. The gain of each beam is about 25 dBi, the aperture efficiency of the MSA is ~40%. Each individual beam had a separate feed point and its own inclination angle (0°, ±3.5°, ±7°, ±10.5°). This paper shows that the presented MSA is not inferior in its characteristics to similar solutions, but is more compact and lighter, and also allows the formation of complex radiation patterns.

Distributed satellite systems are used to achieve improved temporal and spatial resolution of observations, as well as higher response speed and reliability. Satellite networks with global coverage, which are not limited by geographical restrictions, have attracted the interest of the scientific community and industry. Next-generation satellite networks differ from previous satellite networks in that they have built-in processing, low-cost tracking antennas, and inter-satellite communications. This article describes a mission concept, featuring intersatellite communication link based on software-defined radio employing W-band frequencies. The increase in the frequency band to the W-band, E-band is due to the fact that frequency allocations in S, X, Ka, Ku bands get increasingly crowded and difficult to obtain. This study presents an approach to miniaturization of the electronics and antenna technology to ensure W-band communication. The theoretical limits of network throughput with limited size and available energy were explored and described. Several methods have been proposed to increase the payload and expand the network for inter-satellite and subscriber communications, digital signal processing and protocol stack, as well as the satellite subsystem. The current state of and prospects for the development of this technology are described. The purpose of the designed constellation is to provide higher data return, autonomous airborne navigation with less dependence on ground tracking data and significantly reduce the total operating costs of future research missions.