Propagation characteristics of oblique incidence terahertz wave through non-uniform plasma

Chen, Antao; Sun, Haoyu; Han, Yiping; Wang, Jiajie; Cui, Zhiwei

doi:10.1088/1674-1056/28/1/014201

Cited by 14 publications

(5 citation statements)

References 37 publications

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“…The reliability of the calculation results in this work can be verified with the following example. About the oblique incidence of electromagnetic waves in plasma, Chen et al have published related calculation results in their papers [16,17]. The comparison and verification of the calculation results show the reliability of the calculation.…”

Section: H X Y T Y E X Y T Tmentioning

confidence: 96%

Analysis of the influence of sheath positions, flight parameters and incident wave parameters on the wave propagation in plasma sheath

Zhang¹,

Han²,

Dong³

et al. 2022

Plasma Sci. Technol.

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The plasma sheath covering hypersonic vehicles has a significant effect on the propagation of electromagnetic waves. Based on the calculation of the flow field of a conical cylindrical, this work studies the propagation of electromagnetic waves in plasma sheath at L-band and Ku-band, and discusses the propagation characteristics in the head, side and tail of the sheath. The dielectric properties of plasma sheath are related to flight speed and altitude. A flight condition corresponds to a unique distribution of dielectric properties. For the conical cylindrical, the results show that flight speed is generally negatively correlated with the transmissivity of the plasma sheath. The reflection characteristics of electromagnetic waves at the L-band and Ku-band when obliquely incident to the plasma sheath show a downward trend. When the frequency is increased to Ku-band, the propagation characteristics of electromagnetic waves in the plasma sheath are related to the position of the sheath.

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Section: H X Y T Y E X Y T Tmentioning

confidence: 96%

Analysis of the influence of sheath positions, flight parameters and incident wave parameters on the wave propagation in plasma sheath

Zhang¹,

Han²,

Dong³

et al. 2022

Plasma Sci. Technol.

Self Cite

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“…Dong et al [10] investigated the transmission characteristics of terahertz waves in plasma sheaths with different flight speeds and different incidence angles by using the finite difference method of the time domain (FDTD). Chen et al [11] investigated the transmission characteristics of electromagnetic waves in plasma sheaths at different angles of incidence by using the improved scattering matrix method (ISMM). Hao Li theoretically analyzed and calculated the transmission behavior of terahertz waves at different electron densities, magnetic field distributions, and collision frequencies using the scattering matrix method (SMM) [12].…”

Section: Introductionmentioning

confidence: 99%

Terahertz wave propagation characteristics in SMM-based three-dimensional plasma fluid

Zhang,

Wang,

et al. 2024

Phys. Scr.

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During the return to the atmosphere of a hypersonic vehicle in adjacent space, a plasma sheath forms on the surface of the vehicle, which blocks normal electromagnetic communications. The "blackout" phenomenon caused by plasma sheaths has received much attention. This paper focuses on the American RAM-C vehicle as the research object, and utilizes the fluid simulation software USim to numerically simulate the pressure, temperature, and electron density under different flight conditions, and based on the simulation results, selects the appropriate electron density and plasma collision frequency, introduces the terahertz (THz) wave, and adopts the scattering matrix method (SMM) to study the propagation characteristics of the vertically incident non-uniform magnetized plasma with the terahertz wave. Among other things, the transmission characteristics of terahertz waves in the plasma are affected by the flight altitude and flight angle of attack of the vehicle. The conclusions indicate that the transmissivity of terahertz wave transmission in plasma increases, and the reflectivity and absorptance decrease with increasing flight altitude and flight angle of attack. Under the condition of controlling other flight parameters unchanged, the plasma frequency and collision frequency decrease with the increase of flight altitude. The larger the flight angle of attack is, the larger the plasma frequency and collision frequency are. The electron density on the wall surface of the vehicle was also tested, and it was found that the lowest electron density was found at the tail end of the leeward surface. This study can provide some theoretical references for mitigating the "blackout" phenomenon of re-entry vehicles.

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“…It is widely used to analyze electromagnetic wave transmission characteristics in plasma, such as through using the Wentzel-Kramer-Brillouin (WKB) method, scattering matrix method (SMM), finite-difference time-domain (FDTD) method. [14][15][16][17][18][19][20][21][22][23][24][25] Yu et al used the WKB method to study the transmission characteristics of terahertz waves in magnetized plasmas with different electron density distributions. [26] Numerical simulation results demonstrated that the plasma density, plasma slab thickness, plasma density models, and collision frequency significantly influence the attenuation and transmittance of terahertz waves.…”

Section: Introductionmentioning

confidence: 99%

Propagation of terahertz waves in nonuniform plasma slab under “electromagnetic window”

Li¹,

Zhang²,

Yang³

2022

Chinese Phys. B

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The application of magnetic fields, electric fields, and the increase of the electromagnetic wave frequency are up-and-coming solutions for the blackout problem. Therefore, this study considers the influence of the external magnetic field on the electron flow and the effect of the external electric field on the electron density distribution, and uses the scattering matrix method (SMM) to perform theoretical calculations and analyze the transmission behavior of terahertz waves under different electron densities, magnetic field distributions, and collision frequencies. The results show that the external magnetic field can improve the transmission of terahertz waves at the low-frequency end. Magnetizing the plasma from the direction perpendicular to the incident path can optimize the right-hand polarized wave transmission. The external electric field can increase the transmittance to some extent, and the increase of the collision frequency can suppress the right-hand polarized wave cyclotron resonance caused by the external magnetic field. By adjusting these parameters, it is expected to alleviate the blackout phenomenon to a certain extent.

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Propagation characteristics of oblique incidence terahertz wave through non-uniform plasma

Cited by 14 publications

References 37 publications

Analysis of the influence of sheath positions, flight parameters and incident wave parameters on the wave propagation in plasma sheath

Analysis of the influence of sheath positions, flight parameters and incident wave parameters on the wave propagation in plasma sheath

Terahertz wave propagation characteristics in SMM-based three-dimensional plasma fluid

Propagation of terahertz waves in nonuniform plasma slab under “electromagnetic window”

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