Hybrid graphene–copper UWB array sensor for brain tumor detection via scattering parameters in microwave detection system

Jamlos, Mohd Aminudin; Ismail, A. H.; Jamlos, Mohd Faizal; Narbudowicz, Adam

doi:10.1007/s00339-016-0691-6

Cited by 13 publications

(14 citation statements)

References 10 publications

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“…The explicit form (19) of the group Γ M yields for any w ∈ W and s ∈ 1 M Q the equality wγ k λ, s = w(r 1 r 2 ) k λ + M wω k , s = w(r 1 r 2 ) k λ, s + M wω k , s , k = 1, 2.…”

Section: Honeycomb Weyl and Hartley Orbit Functionsmentioning

confidence: 99%

“…Special cases of the presented honeycomb orbit functions represent analogous vibration modes that satisfy either Dirichlet or von Neumann conditions on the boundary of the same type. Since spectral analysis provided by the developed discrete honeycomb transforms enjoys similar boundary properties as the 2D discrete cosine and sine transforms, the output analysis of the graphene-based sensors [19,30] by the honeycomb transforms offers similar data processing potential. The honeycomb discrete transforms provide novel possibilities for study of distribution of spectral coefficients [20], image watermarking [10], encryption [25], and compression [9] techniques.…”

Section: Introductionmentioning

confidence: 99%

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Discrete cosine and sine transforms generalized to honeycomb lattice

Hrivnák

Motlochová

2018

Journal of Mathematical Physics

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The discrete cosine and sine transforms are generalized to a triangular fragment of the honeycomb lattice. The honeycomb point sets are constructed by subtracting the root lattice from the weight lattice points of the crystallographic root system A 2 . The two-variable orbit functions of the Weyl group of A 2 , discretized simultaneously on the weight and root lattices, induce a novel parametric family of extended Weyl orbit functions. The periodicity and von Neumann and Dirichlet boundary properties of the extended Weyl orbit functions are detailed. Three types of discrete complex Fourier-Weyl transforms and real-valued Hartley-Weyl transforms are described. Unitary transform matrices and interpolating behaviour of the discrete transforms are exemplified. Consequences of the developed discrete transforms for transversal eigenvibrations of the mechanical graphene model are discussed.

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“…The explicit form (19) of the group Γ M yields for any w ∈ W and s ∈ 1 M Q the equality wγ k λ, s = w(r 1 r 2 ) k λ + M wω k , s = w(r 1 r 2 ) k λ, s + M wω k , s , k = 1, 2.…”

Section: Honeycomb Weyl and Hartley Orbit Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Discrete cosine and sine transforms generalized to honeycomb lattice

Hrivnák

Motlochová

2018

Journal of Mathematical Physics

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“…In EMIT based brain stroke detection scheme, antenna plays a crucial role. In literature, different EMIT based stroke detection techniques can be found which use rigid and flexible antennas [3][4][5][6][7][8][9][10]. The free space performance of these antennas is presented in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…They classified the results from the human brain model simulation by algorithms, such as PCA and LDA classification algorithms to verify the efficacy of the antenna and found accurate classification. [8]. The authors used the Inverse Fast Fourier Transform (IFFT) for easier analysis of S-parameters and smoothing 'mslowess' procedure to filter out the noise for accurate results.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, a compact slotted disc monopole antenna is designed and printed on a PET substrate for early detection of brain stroke. The size of this antenna is reduced to 40 × 38 mm 2 as compared to earlier reported antennas for stroke detection [5,[7][8][9][10]. Silver nanoparticles (AgNPs) ink is used due to its high conductivity (6.3 × 10 7 S/m) [14] and anti-oxidation properties unlike copper nanoparticles (CuNPs) ink which is extremely vulnerable to oxidation in the air [15].…”

Section: Introductionmentioning

confidence: 99%

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Early Brain Stroke Detection Using Flexible Monopole Antenna

Rahman¹,

Hossain²,

Riheen³

et al. 2020

PIER C

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In this paper, an inkjet printed slotted disc monopole antenna is designed, printed, and analyzed at 2.45 GHz ISM band on a polyethylene terephthalate (PET) substrate for early detection of brain stroke. PET is used as a substrate due to its low loss tangent, flexible, and moistureresistant properties. By the implementation of slotting method, the size of this antenna is reduced to 40 × 38 mm 2 . The printed antenna exhibits 480 MHz (19.55%) bandwidth ranging from 2.25 GHz to 2.73 GHz frequency. It shows a radiation efficiency of 99% with a realized gain of 2.78 dB at 2.45 GHz frequency. The Monostatic Radar (MR) approach is considered to detect brain stroke by analyzing the variations in received signals from the head model with and without stroke. The maximum specific absorption rate (SAR) distribution at 2.45 GHz frequency is calculated. The compact size and flexible properties make this monopole antenna suitable for early detection of brain stroke.

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A double hollow rectangular‐shaped patch and with the slotted ground plane monopole wideband antenna for microwave head imaging applications

Samsuzzaman

Fakeeh

Talukder

et al. 2021

Int J Communication

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This paper introduces a lightweight wideband planar antenna with an antenna array configuration for microwave head imaging. The designed antenna is composed of a double hollow rectangular-shaped patch and with the slotted ground. Its measurements are small: 0.28λ Â 0.24λ Â 0.006λ, where λ is the lowest operating frequency's wavelength. The design process has been completed using CST and then fine-tune the parameters of the architecture structure to accomplish the ideal bandwidth. The antenna is manufactured and measured in order to test antenna properties. The prototype was being used for brain screening than with the Hugo-head model. With adequate impedance matching, the antenna meets an operational bandwidth of 1.82 GHz (1.22-3.04 GHz) with an overall peak gain of 5 dBi with a stable radiation property.Fidelity factors both for face-to-face and side by side alignment are 92.7% and 83.75%, respectively, indicating that the antenna had a little signal interruption. To determine the backscattered signals of the antenna with Hugo-head phantom, a nine-antenna array-based setup is assumed, with one antenna serving as a transmitter and the remaining eight receiving the dispersed signals.

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Hybrid graphene–copper UWB array sensor for brain tumor detection via scattering parameters in microwave detection system

Cited by 13 publications

References 10 publications

Discrete cosine and sine transforms generalized to honeycomb lattice

Discrete cosine and sine transforms generalized to honeycomb lattice

Early Brain Stroke Detection Using Flexible Monopole Antenna

A double hollow rectangular‐shaped patch and with the slotted ground plane monopole wideband antenna for microwave head imaging applications

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