W-shaped slot-loaded U-shaped low SAR patch antenna for microwave-based malignant tissue detection system

Alam, Manawwer; Talukder, Siam; Samsuzzaman, M.; Kasim, Navin; Mehedi, Ibrahim M.; Azim, Rezaul

doi:10.1016/j.cjph.2022.03.003

Cited by 13 publications

(2 citation statements)

References 25 publications

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“…At the same time, the traditional random distribution and the uniform distribution in one of the extreme cases were used as the control experiment to discuss the effect of active elements distribution on the achievable rate for RISs-assisted communication systems. The process of building the simulation experimental model was referred to the literature ( Alam et al, 2022 ; Talukder et al, 2022 ; Khan et al, 2022 ). The simulation results show that the distribution of eight-queens is the closest to the upper limit among these methods and is 7% higher than the traditional methods.…”

Section: Introductionmentioning

confidence: 99%

Achievable rate as affected by active elements distribution in reconfigurable intelligent surfaces for wireless communication

et al. 2023

PeerJ Computer Science

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To increase constantly the achievable rate of reconfigurable intelligent surfaces (RISs)-assisted communication systems, the traditional approaches are to deploy a few active elements randomly on the passive RISs. However, the effect of the geometry distribution of the deployment of the active elements is ignored in performance analysis. In this article, three types of geometry distribution with active elements on RISs, denoted as random distribution, uniform distribution, and eight-queens distribution, are discussed to analyze the affect on achievable rate in RISs-assisted wireless communications. Specifically, the optimal achievable rate is obtained according to the predefined codebook, and the codebook is determined by the reflection beamforming codeword related to the active elements geometry distribution in RISs. Simulation results show that different geometry distribution of active elements in RISs causes different influences to achievable rates. The eight-queens distribution proposed in this article for active elements in RISs brings the highest achievable rate compared with random distribution and uniform distribution. In the passive RISs surface, the distribution of a few active elements is limited by the eight-queens, further enhancing the achievable rate of the wireless communication system. This method has a 7% improvement over the conventional method.

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Section: Introductionmentioning

confidence: 99%

Achievable rate as affected by active elements distribution in reconfigurable intelligent surfaces for wireless communication

et al. 2023

PeerJ Computer Science

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“…Further, progress in radio-frequency microwaves, among others, has provided novel diagnostic and therapeutic methods; whereas microwaves between 400 kHz to 10 GHz are presently being studied for their therapeutic purposes in the medical field [ 16 , 17 , 18 ], and have been explored for diagnostic applications, such as early-stage cancer and tumor detection, organ imaging, etc. [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Microwave Radiation and the Brain: Mechanisms, Current Status, and Future Prospects

Mumtaz

Rana

Choi

et al. 2022

IJMS

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Modern humanity wades daily through various radiations, resulting in frequent exposure and causing potentially important biological effects. Among them, the brain is the organ most sensitive to electromagnetic radiation (EMR) exposure. Despite numerous correlated studies, critical unknowns surround the different parameters used, including operational frequency, power density (i.e., energy dose), and irradiation time that could permit reproducibility and comparability between analyses. Furthermore, the interactions of EMR with biological systems and its precise mechanisms remain poorly characterized. In this review, recent approaches examining the effects of microwave radiations on the brain, specifically learning and memory capabilities, as well as the mechanisms of brain dysfunction with exposure as reported in the literature, are analyzed and interpreted to provide prospective views for future research directed at this important and novel medical technology for developing preventive and therapeutic strategies on brain degeneration caused by microwave radiation. Additionally, the interactions of microwaves with biological systems and possible mechanisms are presented in this review. Treatment with natural products and safe techniques to reduce harm to organs have become essential components of daily life, and some promising techniques to treat cancers and their radioprotective effects are summarized as well. This review can serve as a platform for researchers to understand the mechanism and interactions of microwave radiation with biological systems, the present scenario, and prospects for future studies on the effect of microwaves on the brain.

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A novel compact semicircular defected ground structure ultrawideband monopole antenna integrated with Ku band for breast cancer detection

Subrahmanyam,

Krishna

2023

Int J Communication

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SummaryA compact and novel ultrawideband (UWB) antenna integrated with Ku band for microwave imaging applications is reported. The reported antenna consists of a novel patch structure along with a tapered feed structure on top of FR‐4 substrate having a compact dimension of 16 × 22 mm2 and novel semicircular defected ground structure (SC‐DGS) etched below the substrate. The proposed antenna covers a wide impedance bandwidth of 15.07 GHz spanning from 3.51 to 18.58 GHz with a fractional bandwidth (FBW) of 136%. The intended antenna performance is analyzed for S11, peak gain, efficiency, and radiation patterns in frequency domain, and group delay, isolation (S21), and linear phase response in time domain. The simulated and measured results of reported antenna are well matched for the usage in practical portable UWB applications. More importantly, the proposed antenna system is simulated for the detection of breast cancer tissue by comparison of S21 results, current densities, and specific absorption rate with and without tumor conditions. These findings show that the radiator and the whole system work well in detecting the breast tumor.

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W-shaped slot-loaded U-shaped low SAR patch antenna for microwave-based malignant tissue detection system

Cited by 13 publications

References 25 publications

Achievable rate as affected by active elements distribution in reconfigurable intelligent surfaces for wireless communication

Achievable rate as affected by active elements distribution in reconfigurable intelligent surfaces for wireless communication

Microwave Radiation and the Brain: Mechanisms, Current Status, and Future Prospects

A novel compact semicircular defected ground structure ultrawideband monopole antenna integrated with Ku band for breast cancer detection

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