Design of a novel 3D circular Vivaldi antennas array for Ultra-wideband near-field radar imaging

Alkhalifeh, Khaldoun; Sarkis, R.; Craeye, Christophe

doi:10.1109/eucap.2012.6205930

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…Optimizing such a large array is difficult to achieve by CST time-domain solver due to the huge number of mesh cells to solve. Some numerical methods could be applied to reduce the simulation time such as array scanning method (ASM) [24]. Figure 4(a) shows the array bandwidth of 8element array between 1.47 GHz up to more than 7 GHz.…”

Section: Design Of a 3-d Circular Array In Horizontalmentioning

confidence: 99%

Design of Microwave Antenna Array for Imaging of Multiphase Flows in Polypropylene Pipes

Alkhalifeh

Rmili

Hakim

et al. 2021

International Journal of Antennas and Propagation

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The oil and gas industry requires accurate sensors to control fluid flow in pipelines during the production process from horizontal and near horizontal wells. The extracted crude oil is usually a multiphase mixture of oil, water, and gas, and the accurate measurement of the ratio of each multiphase within the pipeline is an important parameter to manage wells efficiently by maximizing the hydrocarbons that can be extracted. Various methods have been developed for determining the phase ratio including mechanical, optical, X-ray or gamma ray, ultrasound, nuclear magnetic resonance (NMR), and rarely microwave techniques. However, these methods do not permit the knowledge of the real-time evolution of the phase ratio and are less precise. Here, we propose and develop by simulation two microwave systems, in horizontal and vertical polarizations, to choose the optimal configuration for crude pipeline imaging applications. First, the pipeline containing crude oil was modeled and its thermal and dielectric properties are proposed. Then, the antennas array performances were optimized and assembled to the pipeline. Different numbers of antenna elements were successfully investigated using CST simulation in both vertical and horizontal polarizations to find the optimal number of antenna elements for the pipeline applications.

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Section: Design Of a 3-d Circular Array In Horizontalmentioning

confidence: 99%

Design of Microwave Antenna Array for Imaging of Multiphase Flows in Polypropylene Pipes

Alkhalifeh

Rmili

Hakim

et al. 2021

International Journal of Antennas and Propagation

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“…The antenna array based microwave sensor can be used for both reflection and transmission mode measurement.The commonly used designs are linear array (Weiet al 2013), circular array (Alkhalifeh et al 2012), and planar array (Zhuge and Yarovoy 2012), which are shown in Figure 5 With an antenna array, the 2D images of objects can be generated and the analysis of dielectric properties can be conducted. An example of moving tomatoes measured with a continuous wavelinear array scanning is given in Figure 6 (Menget al 2016), where horizontal and vertical axes denote the spatial location, and the colour code denotes the attenuation coefficient.…”

Section: Antenna Array Technologymentioning

confidence: 99%

“…The antenna array-based microwave sensor can be used for both reflection and transmission mode measurement. The commonly used designs are linear array (Wei et al, 2013), circular array (Alkhalifeh et al, 2012) and planar array (Zhuge and Yarovoy, 2012), which are shown in Figures 5(a), 5(b) and 5(c).…”

Section: The Limitations and Potential Techniquesmentioning

confidence: 99%

Microwave sensor technologies for food evaluation and analysis: Methods, challenges and solutions

Meng

Gray

2017

Transactions of the Institute of Measurement and Control

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Microwave sensor technology is widely accepted as a non-destructive and hygienic means for food evaluation and analysis. However, its applications concentrate on in-lab investigations, which are not widely applied for on-line measurement in food industry. Motivated by the rapid progress of microwave technologies and the lack of on-line measurement systems in industry, this paper aims to provide a comprehensive overview of microwave sensors for food measurement, define the technological gap, and suggest the potential solutions. With a brief introduction to the fundamentals, classification and analysis of the traditional methods and technologies are presented, followed by a discussion of calibration and decision-making methods. Based on the analysis of the cutting-edge microwave sensing technologies, the limitations and challenges facing the present studies are identified. Then, focusing on some new emerging technologies including Monolithic Microwave Integrated Circuits (MMIC), antenna array, and System on Chip (SoC) Ultra-Wide Band (UWB) pulse-based time domain systems, the feasibility and prospective of potential solutions in this particular area are suggested. In addition, integration of emerging Information and Communication Technologies (ICT) and new design concepts of the sensor system concerning the practical use for smart manufacturing are also illustrated. The potentiality of the suggested new emerging technologies and integration of ICT to satisfy future digitised industry will be inspirational and of interest to researchers of both microwave engineering and food sectors.

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“…With the use of phase shifters, the focus can be placed at the wanted point in the array plane as presented in [5] for thermotherapy applications. In [15], the design of a circular Vivaldi antenna array for ultra-wideband near-field radar imaging is presented. The focused array can also be designed such that the focal point is on the normal to the array.…”

Section: Introductionmentioning

confidence: 99%

A Circular Array with Improved Focusing Properties

Fwzi¹,

Sayidmarie²

2022

PIER C

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A concentric circular array consisting of two rings is proposed to focus the radiated field at a point in the near-field zone. In the proposed two-ring array, the radius of the outer ring was chosen so that the radiated fields from all elements on the two rings add constructively at the focal point, thus no phase shifter is needed in this design. The N elements of the inner ring are uniformly excited in unity amplitude and zero phase, while the M elements on the outer ring are excited uniformly in phase, and given uniform magnitude excitations of N/M . Therefore, two deep nulls are achieved on both sides of the focus to enhance the focal width. The focusing properties are investigated by exploring the array parameters, such as variation of the focused field along the normal to the array, field distribution on the focal plane, and depth of field (size of the focal spot). Computer simulations using the MATLAB environment are performed by point source radiators. For verification, the array was simulated using the CST microwave studio, and the obtained results showed good agreement. The array is useful for hyperthermia and imaging applications.

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Design of a novel 3D circular Vivaldi antennas array for Ultra-wideband near-field radar imaging

Cited by 11 publications

References 9 publications

Design of Microwave Antenna Array for Imaging of Multiphase Flows in Polypropylene Pipes

Design of Microwave Antenna Array for Imaging of Multiphase Flows in Polypropylene Pipes

Microwave sensor technologies for food evaluation and analysis: Methods, challenges and solutions

A Circular Array with Improved Focusing Properties

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