Konstantin V. Lemberg’s research while affiliated with Siberian Branch of the Russian Academy of Sciences and other places

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.

Antennas based on metasurfaces with tensorial impedance is a relatively new type of antennas appeared in the last decade. They have a simple design, but a complex synthesis procedure. The synthesis procedure can be based on analysis of the properties of waves in periodic structures or on representing the antenna as a phase hologram. Due to the novelty of this type of antennas, researching of various synthesis methods, obtaining new experimental results and on their basis assessment of realistically achievable characteristics is of interest. The purpose of the work was an experimental research of antennas based on metasurfaces with tensorial surface impedance, synthesized according to the method proposed by the authors. To carry out the research, mathematical modeling, electrodynamic modeling, and nearfield measurements of antenna prototypes were used. As a result, it was experimentally confirmed that the proposed tensorial metasurface antennas synthesis method makes it possible to obtain antennas with a given radiation direction and polarization, which have an aperture efficiency of up to 50 %, a bandwidth of up to 8 %, and a cross-polarization level below minus 20 dB. The results of measurements are in a good agreement with the electrodynamic calculation and the parameters specified during the synthesis. The type of antennas described in the work and the given synthesis method, according to the authors, are promising for various applications, for example, in satellite and mobile communications