Comparision of open slot angle for asymmetry slot antenna using 3D finite element method

Thaiwat, K.; Nantivatana, Petch; Phasukkit, Pattarapong; Tungjitkusolmun, S.; Sangworasil, Manas

doi:10.1109/bmeicon.2012.6172028

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…In Fig. 14., it is observed that the temperature distribution of the proposed MOFDM for OASPS is in the more controllable shape than [20], due to the sharp beam of temperature distribution to the target at the front side of slot with the less temperature distribution at the rare side of slot. The SAR results in Fig.…”

Section: Simulation Results On Mofdm For Oaspsmentioning

confidence: 96%

“…The proposed MOFDM for OASPS design output is compared to the design proposed in [20], due to the method proposed in [20] provide the comparison of open slot angle for asymmetry slot antenna using 3D finite element method with the close angle of 90, 180, 270, and 360 degrees, as shown in Figs. 14-17.…”

Section: Simulation Results On Mofdm For Oaspsmentioning

confidence: 99%

“…However, the proposed method is, in fact, can be applied to other design purposes for OASPS. The design result of [20] is L ts = 5.3mm and W d = 3mm. Meanwhile, the result recommended by the proposed MOFDM for OASPS is L ts = 3.3mm and W d = 6mm.…”

Section: Simulation Results On Mofdm For Oaspsmentioning

confidence: 99%

“…For asymmetry slot antenna, according to [19] investigated the characteristics of various slot size and various power for the antennas' temperature distributions and specific absorption rate (SAR). The study of heat transfer for liver tissue of asymmetry coaxial-slot antenna has been experimented by [20]. According to [21] introduced a new, minimally invasive coaxial antenna featuring a miniaturized choke of simple design.…”

Section: Advanced Stage(c)mentioning

confidence: 99%

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Optimal Antenna Slot Design for Hepatocellular Carcinoma Microwave Ablation Using Multi-Objective Fuzzy Decision Making

Nantivatana¹,

Phasukkit²,

Tungjitkusolmun³

et al. 2020

IJIES

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This paper presents the optimal antenna slot position and sizing (OASPS), for microwave (MW) hepatocellular carcinoma (HCC) treatment, using multi-objective fuzzy decision making (MOFDM). In the optimal design problem formulation, the multi-objective for, (1) achievement for a near-spherical zone for ablation defined by axial ratio (AR), (2) the minimum reflection coefficient (S 11), and (3) maximum volume of destroying (VD), are desired. The finite element method (FEM) is used for MW distribution simulation for coordination analysis with the proposed MOFDM based OASPS. The investigation on the design results shown that the temperature distribution of the proposed MOFDM for OASPS is in the more controllable shape comparing to the existing design, due to the sharp beam of temperature distribution to the target at the front side of slot with the less temperature distribution at the rare side of slot. The results also show that the proposed MOFDM for OASPS for OASPS design is easier to manage with the less effect to the rare side of the slot. Moreover, the proposed MOFDM for OASPS resulted in the temperature distribution shape closer to round shape than the existing design. The MOFDM for OASPS is tested on designing of the antenna build up from the coaxial cable. The coaxial cable used is Semi-rigid 141 (RG402 M17/130-RG402 Copper Jacket) including Inner conductor, Dielectric, and Outer conductor. In the simulation, the slot distance from conductor end (L ts), representing the slot position, is varied as 2.3mm, 3.3mm, 4.3mm, 5.3mm, 6.3mm, 7.3mm, and 8.3mm. Meanwhile, the slot size (W d), is varied as 1mm, 2mm, 3mm, 4mm, 5mm, and 6mm. The input power (P i) used is 50 W with the duration of 300 seconds. The comparison of obtained by different L ts and W d , is investigated. The simulation results show that the proposed MOFDM based OASPS can efficiently and effectively provide the near-spherical zone of ablation result with simultaneously trade-off between S 11 minimization and VD maximization.

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Section: Simulation Results On Mofdm For Oaspsmentioning

confidence: 96%

Section: Simulation Results On Mofdm For Oaspsmentioning

confidence: 99%

Section: Simulation Results On Mofdm For Oaspsmentioning

confidence: 99%

Section: Advanced Stage(c)mentioning

confidence: 99%

See 2 more Smart Citations

Optimal Antenna Slot Design for Hepatocellular Carcinoma Microwave Ablation Using Multi-Objective Fuzzy Decision Making

Nantivatana¹,

Phasukkit²,

Tungjitkusolmun³

et al. 2020

IJIES

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show abstract

“…In order to compare the results in terms of power and application time, we have used a tissue temperature distribution model. The targeted radiation in MWA has been presented in (Thaiwat et al 2011) for slot antenna in different open angles without however discussing lesion radius in the active and non active side.…”

Section: Introductionmentioning

confidence: 99%

Targeted Radiation Dipole Antenna using 3D Numerical Simulation in Microwave Ablation

Alnassan

Kastler

Wang

et al. 2015

Proceedings of the International Conference on Biomedical Electronics and Devices

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Microwave ablation technology is being utilised in several medical applications for ablation therapy and other applications. Microwave energy generates fast and high temperatures sufficient and capable to produce coagulation necrosis. Theoretical models by numerical simulation of microwave ablation is a distinct step in the implementation of system design, as well as in the results analysis before the ablation procedure. Furthermore, these models play a role in design the microwave antennas. Classic microwave ablation antenna around its radiating section applies electromagnetic field in tumors without worry about near neural structures. This paper presents the temperature distributions of targeted radiation dipole antenna model with active and non-active sides for microwave ablation at 2.45GHz at different powers and ablation times. Temperature maps and SAR distributions around the radiating section show in two sides.

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A novel frequency beam steering coaxial-slot applicator using matched load for interstitial breast cancer hyperthermia

Moradi

Forooraghi

2015

2015 23rd Iranian Conference on Electrical Engineering

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Comparision of open slot angle for asymmetry slot antenna using 3D finite element method

Cited by 3 publications

References 7 publications

Optimal Antenna Slot Design for Hepatocellular Carcinoma Microwave Ablation Using Multi-Objective Fuzzy Decision Making

Optimal Antenna Slot Design for Hepatocellular Carcinoma Microwave Ablation Using Multi-Objective Fuzzy Decision Making

Targeted Radiation Dipole Antenna using 3D Numerical Simulation in Microwave Ablation

A novel frequency beam steering coaxial-slot applicator using matched load for interstitial breast cancer hyperthermia

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