A Vivaldi Antenna Palm Tree Class with Koch Square Fractal Slot Edge for Near-Field Microwave Biomedical Imaging Applications

Figueredo, Raimundo Eider; Oliveira, Alexandre M. de; Nurhayati, Nurhayati; Neto, Antonio M. de Oliveira; Nogueira, Ingrid Correia; Justo, J. F.; Perotoni, Marcelo B.; Carvalho, Arnaldo de

doi:10.1109/icvee50212.2020.9243220

Cited by 4 publications

(9 citation statements)

References 15 publications

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“…Investigating EM scanning systems reveals that two broad categories of radiators are used to scan the human torso; (1) on-body matched antennas [ 24 , 30 , 31 , 53 , 54 ], and (2) free-space antennas [ 55 , 56 , 57 , 58 , 59 , 60 ]. Different methods were proposed to design these antennas that are detailed in this section.…”

Section: Antenna Designsmentioning

confidence: 99%

“…Vivaldi antennas have been widely used in EM scanning systems due to their wideband operation and high radiating gain [ 28 , 55 , 56 , 65 , 66 , 67 ]. These antennas are generally comprised of a strip feed that is magnetically coupled to a flared ground plane.…”

Section: Antenna Designsmentioning

confidence: 99%

“…These antennas are generally comprised of a strip feed that is magnetically coupled to a flared ground plane. Corrugation methods [ 67 , 68 ] and fractal leaf arm techniques [ 56 , 66 ] are applied on the flared ground structure to increase the electrical length of the antenna for a broad bandwidth and high gain. An example of a Vivaldi antenna with fractal leaf arm is depicted in Figure 13 a. Vivaldi antennas have been investigated for pulmonary edema detection [ 55 ] as well as lung tumor detection [ 56 ].…”

Section: Antenna Designsmentioning

confidence: 99%

“…This technique provides a two-dimension visualization of torso by analyzing the reflection coefficients [ 26 , 56 , 58 , 72 ]. This method transfers measured signals to time domain using an inverse Fourier transform.…”

Section: Microwave Detection Techniquesmentioning

confidence: 99%

“…In [ 56 ], time domain reflectometer (TDR) data, obtained in a linear platform, are used to create an image of the scanned area. The imaging algorithm consists of pre-processing and quadratic envelop detection.…”

Section: Microwave Detection Techniquesmentioning

confidence: 99%

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Electromagnetic Torso Scanning: A Review of Devices, Algorithms, and Systems

et al. 2021

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The past decade has witnessed a surge into research on disruptive technologies that either challenge or complement conventional thoracic diagnostic modalities. The non-ionizing, non-invasive, compact, and low power requirements of electromagnetic (EM) techniques make them among the top contenders with varieties of proposed scanning systems, which can be used to detect wide range of thoracic illnesses. Different configurations, antenna topologies and detection or imaging algorithms are utilized in these systems. Hence, to appreciate their progress and assess their potential, a critical review of EM thoracic scanning systems is presented. Considering the numerous thoracic diseases, such as fatty liver disease, lung cancer, respiratory and heart related complications, this paper will exclusively focus on torso scanning systems, tracing the early foundation of research that studied the possibility of using EM waves to detect thoracic diseases besides exploring recent progresses. The advantages and disadvantages of proposed systems and future possibilities are thoroughly discussed.

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Section: Antenna Designsmentioning

confidence: 99%

Section: Antenna Designsmentioning

confidence: 99%

Section: Antenna Designsmentioning

confidence: 99%

Section: Microwave Detection Techniquesmentioning

confidence: 99%

Section: Microwave Detection Techniquesmentioning

confidence: 99%

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Electromagnetic Torso Scanning: A Review of Devices, Algorithms, and Systems

et al. 2021

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A Sierpinski Arrowhead Curve Slot Vivaldi Antenna for Microwave Head Imaging System

et al. 2023

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The development of antipodal Vivaldi antenna with a fractal slot is presented in this paper due to its promising application as an element of possible multisensory systems of head stroke imaging. The fractal slot is applied to improve the directivity, bandwidth and gain of the antenna. Hence, this research mainly aims to create and optimise a compact Vivaldi antenna through the fractal slot for the detection of stroke in the human head. The antenna is designed with an overall dimension of 65 × 65 × 1.6 mm 3 using Roger RO4350B as a substrate through the CST Studio Suite 2019 software. The proposed antenna will also be compared with an antipodal Vivaldi antenna without the fractal slot to observe differences in the result. The proposed antenna can produce a wide bandwidth of 1.44 GHz ranging from 2.35 GHz to 3.79 GHz at the maximum gain of 7.35 dBi. Furthermore, the prototype antenna has a directivity characteristic, which produces the unidirectional radiation necessary for microwave imaging procedures. The proposed antenna is also evaluated with the CST studio head model, thus providing satisfactory penetration results through the head tissue. A value of 0.0013 W/kg per 10 g is achieved for the maximum SAR. Thus, the proposed antenna met most of the requirements for the imaging process, which will affect its effectiveness during scanning of head stroke. Fractal slot, Vivaldi antenna, wideband, unidirectional, head imaging. INDEX TERMS

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Design of Wideband Antenna for Brain Imaging System

et al. 2023

2023 3rd International Conference on Intelligent Technologies (CONIT)

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A Vivaldi Antenna Palm Tree Class with Koch Square Fractal Slot Edge for Near-Field Microwave Biomedical Imaging Applications

Cited by 4 publications

References 15 publications

Electromagnetic Torso Scanning: A Review of Devices, Algorithms, and Systems

Electromagnetic Torso Scanning: A Review of Devices, Algorithms, and Systems

A Sierpinski Arrowhead Curve Slot Vivaldi Antenna for Microwave Head Imaging System

Design of Wideband Antenna for Brain Imaging System

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