The Influence of Random Internal Waves on the Characteristics of a Horizontal Antenna in a Shallow Sea

IF 0.9 4区 物理与天体物理 Q4 ACOUSTICS Acoustical Physics Pub Date : 2023-11-16 DOI:10.1134/S1063771023600705
M. A. Raevskii, V. G. Burdukovskaya
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Abstract—The effect of random internal waves on the gain and pattern of a horizontal antenna array in a shallow sea has been investigated. An algorithm for calculating the correlation matrix of the point source field at the grating aperture is proposed. The antenna gain is analyzed for different spatial processing methods: the beam forming method, the optimal linear processing method, and the optimal quadratic processing method. The effect of internal waves on the directivity pattern is described by the dispersion of the angular response of the grating. Numerical simulation results are presented for a model summer-type waveguide and an exponential Brunt–Väisälä frequency profile. The empirical internal wave spectrum proposed earlier from the SWARM95 experiment is used. The dependences of the antenna array characteristics on the number of its elements, orientation with respect to the source, radiation frequency, and the acoustic characteristics of the bottom are analyzed.

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浅海中随机内波对水平天线特性的影响
摘要研究了浅海中随机内波对水平天线阵增益和方向图的影响。提出了一种计算光栅孔径处点源场相关矩阵的算法。分析了波束形成法、最优线性处理法和最优二次处理法对天线增益的影响。用光栅的角响应色散来描述内波对指向性图的影响。给出了夏季型波导模型和指数Brunt-Väisälä频率分布的数值模拟结果。本文采用SWARM95实验中提出的经验内波谱。分析了天线阵的单元数、相对于源的方向、辐射频率和底部声学特性对天线阵特性的影响。
本文章由计算机程序翻译，如有差异，请以英文原文为准。
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来源期刊
Acoustical Physics
Acoustical Physics 物理-声学
CiteScore
1.60
自引率
50.00%
发文量
58
审稿时长
3.5 months
期刊介绍： Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.
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