An integrated optical beamforming network for two-dimensional phased array radar

Cheng, Qiman; Zheng, Shilie; Zhang, Qiang; Ji, Jun; Yu, Hui; Zhang, Xianmin

doi:10.1016/j.optcom.2021.126809

Cited by 15 publications

(5 citation statements)

References 17 publications

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Section: Phased Array Radar Issuesmentioning

confidence: 99%

“…A uniform rectangular array (URA) radar can be used to observe and control presence of multiple ground-surface objects (sometimes also called targets) within a nearby area [1], [2]. The URA radar is a static mechanic system that scans the area without turning the antenna elements (URA sensors) [2], [3]. This is done by using the phase shifters [4], [5] delaying the radio waves progressively so that each sensor emits its wavefront in a specific order.…”

Section: Phased Array Radar Issuesmentioning

confidence: 99%

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Accurate Detection of Multiple Targets by Uniform Rectangular Array Radar With Threshold Soft Update and Area Rescanning

Romanuke¹

2022

ITS

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Background. If the intensity of moving targets within a surveyed area is low, an optimal number of uniform rectangular array (URA) radar sensors is in either the minimally-sized URA (or close to it) or maximally-sized URA (or close to it), where the URA size is regulated by (symmetrically) turning off vertical and horizontal sensors. However, this does not guarantee detection of any target because sometimes the threshold detection, by which the main parameters of a pair of two targets are estimated, fails even by using the soft threshold approach when the threshold is gradually decreased while the detection fails. Objective. In order to improve detection of multiple ground-surface targets by a URA radar, the goal is to decrease a number of detection fails, when targets are just missed. For this, the approach of threshold soft update and a set of quasioptimal URA sizes included and URAs are to be used by rescanning the area if the detection fails. Methods. To achieve the goal, the functioning of the URA radar is simulated for a set of randomly generated targets, where roughly a half of the set is to be of single targets, and the other half is to be of pairs of targets. The simulation is configured and carried out by using MATLAB® R2021b Phased Array System ToolboxTM functions based on a model of the monostatic radar. Results. Neither the soft threshold approach, nor the rescanning increase the detection accuracy. However, when either the soft threshold or rescanning is applied, or they both are applied, the number of detections is increased. The increment can be evaluated in about 2.7 %, but the expected high-accurate detection performance slightly drops. This is caused by that the soft thresholding and rescanning attempt at retrieving at least some information about the target instead of the detection fail. Conclusions. Using the threshold soft update approach along with a more frequent rescanning decreases a number of detection fails. Besides, the soft thresholding and rescanning allow slightly decreasing the number of URA sensors sufficient to maintain the same detection accuracy by increasing the averaged number of single-target and two-target detections at least by 2.5 %. The increment in a number of detected targets on average is equivalent to increasing the probability of detection.

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Section: Phased Array Radar Issuesmentioning

confidence: 99%

Section: Phased Array Radar Issuesmentioning

confidence: 99%

Accurate Detection of Multiple Targets by Uniform Rectangular Array Radar With Threshold Soft Update and Area Rescanning

Romanuke¹

2022

ITS

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“…Such a feature makes the beams carrying OAM a perfect solution for the increasing demand of larger bandwidth and higher data rates in a diversity of applications such as 5G and 6G communication links, laser satellite communications, and remote sensing. However, in these applications the propagation of the laser beam in a random medium, which represents the channel of the system, degrades the probability of error performance of the system [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Propagation of Vortex Beams in Random Mediums

Dalgaç¹,

Elmabruk²

2022

Vortex Dynamics - From Physical to Mathematical Aspects

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Vortex beams acquire increasing attention due to their unique properties. These beams have an annular spatial profile with a dark spot at the center, the so-called phase singularity. This singularity defines the helical phase structure which is related to the topological charge value. Topological charge value allows vortex beams to carry orbital angular momentum. The existence of orbital angular momentum offers a large capacity and high dimensional information processing which make vortex beams very attractive for free-space optical communications. Besides that, these beams are well capable of reducing turbulence-induced scintillation which leads to better system performance. This chapter introduces the research conducted up to date either theoretically or experimentally regarding vortex beam irradiance, scintillation, and other properties while propagating in turbulent mediums.

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“…We will consider a hierarchically constructed nanocomposite based on silicon and aluminum (Si-Al). Such nanocomposites are of wide interest for various applications in modern optics and radiophysics [23][24][25]. Elements based on such hierarchically constructed nanocomposites are used in the creation of new innovative antenna designs [26,27], broadband and nonlinear radar devices [28,29], the creation of means for localization and tracing of mobile objects [30,31], the synthesis of selective and absorbing materials [32,33], as well as in the creation of intelligent applications for the physical protection of information [34,35].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Layered Nanocomposite of Fractal Structure

et al. 2021

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A model of a layered hierarchically constructed composite is presented, the structure of which demonstrates the properties of similarity at different scales. For the proposed model of the composite, fractal analysis was carried out, including an assessment of the permissible range of scales, calculation of fractal capacity, Hausdorff and Minkovsky dimensions, calculation of the Hurst exponent. The maximum and minimum sizes at which fractal properties are observed are investigated, and a quantitative assessment of the complexity of the proposed model is carried out. A software package is developed that allows calculating the fractal characteristics of hierarchically constructed composite media. A qualitative analysis of the calculated fractal characteristics is carried out.

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An integrated optical beamforming network for two-dimensional phased array radar

Cited by 15 publications

References 17 publications

Accurate Detection of Multiple Targets by Uniform Rectangular Array Radar With Threshold Soft Update and Area Rescanning

Accurate Detection of Multiple Targets by Uniform Rectangular Array Radar With Threshold Soft Update and Area Rescanning

The Propagation of Vortex Beams in Random Mediums

Mathematical Modeling of Layered Nanocomposite of Fractal Structure

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