Transmission properties of microwave in rectangular waveguide through argon plasma

Han, Xiaoyu; Li, Dawei; Chen, Meie; Zhang, Zhan; Li, Zheng; Li, Yujian; Wang, Junhong

doi:10.1088/1674-1056/28/3/035204

Cited by 8 publications

(1 citation statement)

References 24 publications

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“…For this purpose, J. J. Mankowski [2] increased the local electric field strength by inserting a tungsten electrode into the waveguide, and used this structure to test the ionization process of argon at different pressures, proving that the response time of this plasma limiter model can reach the order of ns when the average power is not more than 10W. Han et al [3]studied the reflection, absorption and transmission of waveguide plasma limiter. Liu et al [4] studied the characteristics of the interaction between L-band HPM and Ar plasma theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of waveguide plasma limiter under high power microwave based on the SETD method

Wang

Liao

Yuan

et al. 2023

Advanced Fiber Laser Conference (AFL2022)

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Aiming at the "front door" protection problem of radar system, a waveguide plasma limiter with short response time, short recovery time and high isolation is presented based on the reflection and absorption characteristics of electromagnetic wave for high-power microwave (HPM) environment. A self-consistent three-dimensional (3-D) multiphysics electromagnetic-plasma fluid model coupling full-wave Maxwell's equations with plasma fluid equations is established and solved by the spectral-element time-domain (SETD) method to describe the operating mechanism of the waveguide plasma limiter. The Galerkin's method is employed for the space discretization and the central difference scheme is used for the temporal discretization during the SETD process. Numerical results demonstrate that the gas with low critical breakdown field strength is more suitable for protecting high-power microwaves. Our research can provide theoretical guidance for designers and give the complete physical process of plasma limiter.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of waveguide plasma limiter under high power microwave based on the SETD method

Wang

Liao

Yuan

et al. 2023

Advanced Fiber Laser Conference (AFL2022)

View full text Add to dashboard Cite

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Transient analysis of light brightness emitted from high power microwave nitrogen breakdown under external dc magnetic field

et al. 2020

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A three-dimensional (3D) multi-physics model is developed to describe the characteristics of light emitted from high power microwave nitrogen breakdown. This model consists of electromagnetic (EM) fields and plasma physics in which plasma physics and EM fields are controlled by plasma fluid equations and Maxwell's equations. A continuity equation of excited molecule (ion) is introduced into the fluid model to describe the light brightness produced in the breakdown system. The resulting multi-physics system is analyzed and described with the spectral-element time-domain method. The external dc magnetic field applied in breakdown volume is used to prolong the breakdown time. The light brightness is weakened by the dc magnetic field before the occurrence of breakdown, and the variation in light brightness with different wavelengths produced by breakdown is discussed. The position of the maximum light brightness spot can be changed by the influence of the dc magnetic field on the electron concentration. Our research provides theoretical guidance for further understanding the physical process and physical phenomena in microwave nitrogen breakdown.

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Simulation of high-power microwaves gas breakdown with a modified multi-physical model

et al. 2021

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In this paper, a modified multi-physics method for transient analysis of high-power microwaves (HPM) gas breakdown is proposed. Distinguished from previous works, the proposed method couples the plasma fluid equations with Maxwell's equations to fully consider the interaction between plasma and electromagnetic waves. To perform the numerical simulation, the spectral-element time-domain method is employed, which has the advantages of spectral accuracy and block diagonal mass matrix. Numerical simulations are conducted to demonstrate the accuracy of the proposed method. Moreover, with an external DC magnetic field, HPM breakdown can be effectively delayed by increasing its breakdown threshold. Simultaneously, the phase shift of electromagnetic waves during the HPM breakdown can also be controlled by the external DC magnetic field, which can improve the quality of the phase-modulated signal in HPM illumination. This proposed framework is expected to provide an effective numerical tool for analyzing the microwave propagation characteristics and suppressing the HPM breakdown in gas-filled microwave devices.

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Transmission properties of microwave in rectangular waveguide through argon plasma

Cited by 8 publications

References 24 publications

Numerical simulation of waveguide plasma limiter under high power microwave based on the SETD method

Numerical simulation of waveguide plasma limiter under high power microwave based on the SETD method

Transient analysis of light brightness emitted from high power microwave nitrogen breakdown under external dc magnetic field

Simulation of high-power microwaves gas breakdown with a modified multi-physical model

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