Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect

Oh, Taejoo; Cho, Changseok; Ahn, Wookhyun; Yook, Jong Gwan; Lee, Jangjae; You, S. J.; Yim, Jinwoo; Ha, Jungje; Bae, Gihun; You, Heung-Cheol; Lee, Yong-Shik

doi:10.3390/s21248486

Cited by 9 publications

(11 citation statements)

References 14 publications

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“…The dielectric rim, fabricated using an FR-4 substrate with a permittivity of 4.5, was 15 mm wide. This configuration not only enhances the plasma reduction effect, as mentioned in [ 18 ], but also ensures that the pressure between the two electrodes remains independent of the environmental pressure. Consequently, the generator can effectively operate under various pressure conditions.…”

Section: Experimental Setup For Measuring Thermal Deformationmentioning

confidence: 91%

“…The dielectric barrier discharge (DBD) plasma generator, on the other hand, is relatively thin and generates less heat during plasma generation compared to inductively coupled plasma (ICP) [ 18 , 19 , 20 , 21 ]. However, the DBD plasma generator structure also requires the application of a high bias voltage, which generates significant heat that, although small compared to ICP, can cause structural deformation depending on the thermal tolerance of the DBD plasma generator components.…”

Section: Introductionmentioning

confidence: 99%

“…To demonstrate the validity of the proposed thermal compensation method, RCS measurement experiments were conducted on the structure presented in [ 18 ] and a new DBD plasma generator structure. The experimental results show that the accuracy of the simulation and measurement results is improved by using the proposed method.…”

Section: Introductionmentioning

confidence: 99%

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Compensation of Heat Effect in Dielectric Barrier Discharge (DBD) Plasma System for Radar Cross-Section (RCS) Reduction

Jung

Cho

Choi

et al. 2023

Sensors

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In this study, the problems encountered in radar cross-section (RCS) measurement experiments utilizing a dielectric barrier discharge (DBD) plasma system are examined and an effective solution is proposed. A DBD plasma system generates heat due to the high bias voltage required for plasma generation. The thermal-induced structural deformation of the DBD structure caused by this high voltage and its impact on RCS measurements are analyzed. In addition, techniques for minimizing the thermal-induced deformation and compensation methods for addressing the minimized deformation are proposed. Furthermore, RCS measurements are conducted on two kinds of DBD structures using the proposed method to experimentally demonstrate the improved agreement between the simulation and measurement results. For both structures, the RCS experimental results are in very good agreement with the simulation results, which enables accurate plasma characterization. In conclusion, it can be expected that the proposed method can be used to provide more accurate RCS measurements on various DBD structures that generate high heat.

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Section: Experimental Setup For Measuring Thermal Deformationmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Compensation of Heat Effect in Dielectric Barrier Discharge (DBD) Plasma System for Radar Cross-Section (RCS) Reduction

Jung

Cho

Choi

et al. 2023

Sensors

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“…When electrons or photos with sufficient energy collide with the neutral atoms and molecules in the feed gas, electrons and ions are produced in the gas phase [38]. Various techniques, such as glow discharge, dielectric barrier discharge and radio frequency discharge, have been employed to generate plasma in experimental studies [39][40][41][42]. Due to the difficulty associated with generating and maintaining a certain density of plasma in a lowaltitude open environment [43,44] the plasma in the closed cavity with low gas pressure is used in this paper.…”

Section: The Physical Model Of the Proposed Absorbermentioning

confidence: 99%

Design of a wideband and tunable radar absorber

Gao,

Dou,

Peng

et al. 2023

Mater. Res. Express

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To effectively address the challenges posed by intricate and dynamic electromagnetic environments, we propose a wideband and tunable radar absorber in this paper. The proposed absorber, composed of graphene capacitor, plasma enclosed within a sealed glass cavity, radar absorbing material (RAM), FR-4 and copper plate, allows for tunable radar absorbing performance through the manipulation of the electromagnetic properties of the graphene capacitor and plasma. Based on the equivalent circuit model, the reflectivity of the radar absorber is analyzed using transmission line theory (TLT). Good agreement is observed between the full-wave simulations and the TLT. The study thoroughly investigates the influence of graphene, plasma, and RAM components, as well as their sequential arrangement within the radar absorber, on its reflectivity, expounding the fundamental mechanism of these materials' synergistic integration. Additionally, the effects of key factors, including the surface resistance R_g of graphene, plasma frequency w_p, collision frequency v_p and plasma thickness t_plasma, on the radar absorbing performance are examined. Our findings reveal that adjusting surface resistance R_g controls the absorbing amplitude, and manipulation of the plasma frequency and collision frequency tunes the absorbing frequency and effective absorbing band. By appropriately adjusting the surface resistance R_g of graphene, plasma frequency w_p and collision frequency v_p, the proposed radar absorber exhibits superior performance in the frequency range of 1GHz to 10GHz. The radar absorber we propose serves as a significant reference for the application of tunable radar absorbers and adaptive radar stealth techniques.

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“…Angle independence and polarization insensitivity of the frequency response to incident electromagnetic waves are required for these kinds of applications [3]. Other more specific applications have also been reported, as for example in imaging [4] or in remote sensing in [5].…”

Section: Introductionmentioning

confidence: 99%

Frequency Selective Surface for Ultra-Wide Band Filtering and Shielding

Sabata

Matekovits

Buta

et al. 2022

Sensors

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A frequency selective surface for spatial filtering in the standardized Ultra-Wide Band (UWB) frequency range is proposed. A very large stop-band of 1.75–15.44 GHz has been obtained, with good polarization insensitivity and an angular stability of more than 60∘ and more than 50∘ in TE and TM incidence, respectively. Circuit models have been devised. The structure has been assessed by electromagnetic simulation and implemented on an FR4 substrate of 1.6 mm thickness, with an edge of the square-shaped unit cell of 15 mm. Tests in an anechoic chamber demonstrated good matching between simulation and experimental results and proper operation of the device.

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Plasma Generator with Dielectric Rim and FSS Electrode for Enhanced RCS Reduction Effect

Cited by 9 publications

References 14 publications

Compensation of Heat Effect in Dielectric Barrier Discharge (DBD) Plasma System for Radar Cross-Section (RCS) Reduction

Compensation of Heat Effect in Dielectric Barrier Discharge (DBD) Plasma System for Radar Cross-Section (RCS) Reduction

Design of a wideband and tunable radar absorber

Frequency Selective Surface for Ultra-Wide Band Filtering and Shielding

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