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Isolation of the field component formed by a given beam of rays at the aperture of a receiving antenna in an inhomogeneous environment

† 
Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, ul. Ulyanova 46, Nizhny Novgorod, 603000, Russian Federation

A generalization of the classical procedure for forming a receiving antenna beam in a homogeneous space to the case of an inhomogeneous medium is discussed. In free space, this procedure isolates the component of the registered field, which represents the contribution of a beam of parallel rays. In an inhomogeneous medium, the procedure should isolate the contribution of a beam of rays, which, as a rule, are not parallel. The generalization is carried out on the basis of the transition from the traditional representation of the registered field in the form of a superposition of plane waves to the coherent state expansion of the field borrowed from quantum mechanics. The general approach is illustrated using the example of the lobe formation of a vertical receiving antenna in an underwater acoustic waveguide.

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Fulltext is also available at DOI: 10.3367/UFNe.2022.08.039229
Keywords: antenna, beamforming, beam of rays, coherent state, acoustic waveguide
PACS: 43.30.Cq, 43.30.Dr (all)
DOI: 10.3367/UFNe.2022.08.039229
URL: https://ufn.ru/en/articles/2023/9/g/
001112661900007
2-s2.0-85182872358
2023PhyU...66..951V
Citation: Virovlyansky A L "Isolation of the field component formed by a given beam of rays at the aperture of a receiving antenna in an inhomogeneous environment" Phys. Usp. 66 951–960 (2023)
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Received: 20th, May 2022, revised: 5th, August 2022, 29th, August 2022

Оригинал: Вировлянский А Л «Выделение компоненты поля, формируемой заданным пучком лучей на апертуре приёмной антенны в неоднородной среде» УФН 193 1010–1020 (2023); DOI: 10.3367/UFNr.2022.08.039229

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