A Fern Antipodal Vivaldi Antenna for Near-Field Microwave Imaging Medical Applications

Oliveira, Alexandre M. de; Oliveira, Antonio. M. de; Perotoni, Marcelo B.; Nurhayati, N.; Baudrand, H.; Carvalho, Arnaldo de; Justo, J. F.

doi:10.1109/tap.2021.3096942

Cited by 40 publications

(13 citation statements)

References 57 publications

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“…Gain (dBi) FF (%) Max. SAR (W/kg) Imaging system Detected tumor Tested phantom model 20 Antipodal Vivaldi 150 × 150 × 1.60 FR4 1 No 1.00–3.30, 106.97% 6.60 NP NP Single antenna, simulated One Semi realistic homogeneous 21 Microstrip 70 × 50 × 1.55 FR4 1 No 0.80–1.20, 40% NP NP NP Two antennas, Simulated One 3D plastic head model 22 Microstrip 64 × 42 × 1.60 FR4 1 No 1.40–2.52, 57.14% 3.5 80 0.300 Nine antennas, simulated One Simulated Hugo head model 24 Microstrip 32 × 24 × 1.60 FR4 1 Yes 0.75–1.60, 72.345 4.5 NP NP Twelve antennas, simulated One 3D SAM head phantom model 25 Microstrip …”

Section: Microwave Brain Imaging Results and Discussionmentioning

confidence: 99%

“…Different antennas have been offered to develop an MBI system to detect brain tumors. A fern antipodal Vivaldi antenna was proposed in 20 to detect brain tumor. The dimension of the antenna was 150 × 150 mm 2 , and the operating frequency was 1–3.3 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…The dimension of the antenna was 150 × 150 mm 2 , and the operating frequency was 1–3.3 GHz. The authors in 20 only implemented a simulation-based imaging system. They did not implement any experimental system, and no SAR (specific absorption rate) analysis was presented.…”

Section: Introductionmentioning

confidence: 99%

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Microwave brain imaging system to detect brain tumor using metamaterial loaded stacked antenna array

Hossain

Islam

Beng

et al. 2022

Sci Rep

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In this paper, proposes a microwave brain imaging system to detect brain tumors using a metamaterial (MTM) loaded three-dimensional (3D) stacked wideband antenna array. The antenna is comprised of metamaterial-loaded with three substrate layers, including two air gaps. One 1 × 4 MTM array element is used in the top layer and middle layer, and one 3 × 2 MTM array element is used in the bottom layer. The MTM array elements in layers are utilized to enhance the performance concerning antenna’s efficiency, bandwidth, realized gain, radiation directionality in free space and near the head model. The antenna is fabricated on cost-effective Rogers RT5880 and RO4350B substrate, and the optimized dimension of the antenna is 50 × 40 × 8.66 mm3. The measured results show that the antenna has a fractional bandwidth of 79.20% (1.37–3.16 GHz), 93% radiation efficiency, 98% high fidelity factor, 6.67 dBi gain, and adequate field penetration in the head tissue with a maximum of 0.0018 W/kg specific absorption rate. In addition, a 3D realistic tissue-mimicking head phantom is fabricated and measured to verify the performance of the antenna. Later, a nine-antenna array-based microwave brain imaging (MBI) system is implemented and investigated by using phantom model. After that, the scattering parameters are collected, analyzed, and then processed by the Iteratively Corrected delay-multiply-and-sum algorithm to detect and reconstruct the brain tumor images. The imaging results demonstrated that the implemented MBI system can successfully detect the target benign and malignant tumors with their locations inside the brain.

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Section: Microwave Brain Imaging Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microwave brain imaging system to detect brain tumor using metamaterial loaded stacked antenna array

Hossain

Islam

Beng

et al. 2022

Sci Rep

View full text Add to dashboard Cite

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“…Further, Table 2 includes the comparison of the proposed AVA with best‐performing and recently reported AVAs. All AVAs reported in the Table 2, are of larger size as compared to the proposed AVA except the AVA designed in Reference 27, but it provides less gain and lower SLLs. Next, the AVAs implemented in References 14,17–26 gives better gain than the proposed AVA, but their dimensions are large, which render their use in the compact systems.…”

Section: Resultsmentioning

confidence: 99%

A low profile antipodal Vivaldi antenna with improved front‐to‐back ratio and sidelobe levels for 5G applications

Dixit

Kumar

2022

Int J RF Mic Comp-Aid Eng

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In this article, a novel miniaturized antipodal Vivaldi antenna (AVA) is proposed with significant improvement in the back and sidelobe levels (SLLs) to mitigate their adverse effect on the communication system components. The proposed AVA enhances SLL up to À5.7 dB and front to back ratio (FBR) to 20.2 dB. These improvements are accomplished by antenna size reduction and gain enhancement. The proposed AVA is miniaturized by 22.27% and the gain is increased up to 4 dBi compared to the conventional AVA (CAVA). The AVA is designed by incorporating substrate integrated waveguide (SIW) and corrugations. The use of corrugations improves the FBR and gain. Next, the improvements in the bandwidth and SLL are achieved by SIW. The antenna dimensions are 15 Â 6 Â 0.5 mm 3 and it provides the enhanced and almost constant gain of 9.5 ± 1.5 dBi. The antenna is designed for the 38 GHz band of 5G applications and it has an impedance bandwidth of 36-48.43 GHz. The efficiency of an antenna is above 94% over the desired frequency range. The antenna is fabricated and verified with experimental results. The proposed antenna makes it as one of the best choices as a 5G antenna.

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“…[38][39][40] are of larger size than the proposed AVA-LC. Next, other AVAs designed by [41][42][43][44][45] are comparatively smaller in size, but their gains are lower than the proposed AVA-LC. Further, the antenna designed in [46] gives less gain and narrower bandwidth.…”

Section: Lens and Corrugation Designmentioning

confidence: 94%

A Constant Gain and Miniaturized Antipodal Vivaldi Antenna for 5G Communication Applications

Dixit¹,

Kumar²,

Urooj³

2022

Computers, Materials &Amp; Continua

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This paper proposes a stable gain and a compact Antipodal Vivaldi Antenna (AVA) for a 38 GHz band of 5G communication. A novel compact AVA is designed to provide constant gain, high front to back ratio (FBR), and very high efficiency. The performance of the proposed AVA is enhanced with the help of a dielectric lens (DL) and corrugations. A rectangular-shaped DL is incorporated in conventional AVA (CAVA) to enhance its gain up to 1 dBi and the bandwidth by 1.8 GHz. Next, the rectangular corrugations are implemented in CAVA with lens (CAVA-L) to further improve the gain and bandwidth. The proposed AVA with lens and corrugations (AVA-LC) gives a constant and high gain of 8.2 to 9 dBi. The designed AVA-LC operates from 34 to 45 GHz frequency which covers 38 GHz (37.5 to 43.5 GHz) band of 5G applications. Further, the presented AVA-LC mitigates the back lobe and sidelobe levels, resulting in FBR and efficiency improvement. The FBR is in the range of 12.2 to 22 dB, and efficiency is 99%, almost constant. The AVA-LC is fabricated on Roger's RT/duroid 5880 substrate, and it is tested to verify the simulated results. The proposed compact AVA-LC with high gain, an improved FBR, excellent efficiency, and stable radiation patterns is suitable for the 38 GHz band of 5G devices.

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A Fern Antipodal Vivaldi Antenna for Near-Field Microwave Imaging Medical Applications

Cited by 40 publications

References 57 publications

Microwave brain imaging system to detect brain tumor using metamaterial loaded stacked antenna array

Microwave brain imaging system to detect brain tumor using metamaterial loaded stacked antenna array

A low profile antipodal Vivaldi antenna with improved front‐to‐back ratio and sidelobe levels for 5G applications

A Constant Gain and Miniaturized Antipodal Vivaldi Antenna for 5G Communication Applications

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