Analyses of Electromagnetic Properties of a Hypersonic Object With Plasma Sheath

Sha, Yi-Xin; Zhang, H. L.; Guo, Xing-Yue; Xia, Mingyao

doi:10.1109/tap.2019.2891462

Cited by 37 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…employing more sophisticated methods to study more in detail the interaction of the plasma with the electromagnetic wave, for instance Finite-Difference Time-Domain (FDTD) (Marshall & Close 2015), optical ray tracing (Vecchi et al 2004), or Volume-Surface Integral Equation (VSIE) (Sha et al 2019) techniques.…”

Section: Discussionmentioning

confidence: 99%

A self-consistent method for the simulation of meteor trails with an application to radio observations

Bariselli

Boccelli

Dias

et al. 2020

A&A

View full text Add to dashboard Cite

Context. Radio-based techniques allow for a meteor detection of 24 h. Electromagnetic waves are scattered by the electrons produced by the ablated species colliding with the incoming air. As the electrons dissipate in the trail, the received signal decays. The interpretation of these measurements entails complex physical modelling of the flow. Aims. In this work, we present a procedure to compute extensive meteor trails in the rarefied segment of the trajectory. This procedure is a general and standalone methodology, which provides meteor physical parameters at given trajectory conditions, without the need to rely on phenomenological lumped models. Methods. We started from fully kinetic simulations of the evaporated gas that describe the nonequilibrium in the flow and the ionisation collisions experienced by metals in their encounter with air molecules. These simulations were employed as initial conditions for performing detailed chemical and multicomponent diffusion calculations of the extended trail, in order to study the processes which lead to the extinction of the plasma. In particular, we focused on the evolution of the trail generated by a 1 mm meteoroid flying at 32 km s−1, above 80 km. We retrieved the ambipolar diffusion coefficient and the electron line density and compared the outcome of our computations with classical results and observational fittings. Finally, the electron field was employed to estimate the resulting reflected signal, using classical radio-echo theory for underdense meteors. Results. A global and constant diffusion coefficient is sufficient to reproduce numerical profiles. A good agreement is found when we compare the extracted diffusion coefficients with theory and observations.

show abstract

Section: Discussionmentioning

confidence: 99%

A self-consistent method for the simulation of meteor trails with an application to radio observations

Bariselli

Boccelli

Dias

et al. 2020

A&A

View full text Add to dashboard Cite

show abstract

“…A communication channel through the plasma sheath can solve the blackout problem for re-entry of spacecrafts [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. The essence of this problem is that a supersonic flying vehicle in the atmosphere is inevitably covered by a weakly conducting ionized gas, which is opaque for electromagnetic waves in the frequency range 100 MHz–10 GHz (the most important range for current telecommunications).…”

Section: Introductionmentioning

confidence: 99%

Issues with Modeling a Tunnel Communication Channel through a Plasma Sheath

Bogatskaya

Schegolev

Klenov

et al. 2022

Sensors

View full text Add to dashboard Cite

We consider two of the most relevant problems that arise when modeling the properties of a tunnel radio communication channel through a plasma layer. First, we studied the case of the oblique incidence of electromagnetic waves on a layer of ionized gas for two wave polarizations. The resonator parameters that provide signal reception at a wide solid angle were found. We also took into account the unavoidable presence of a protective layer between the plasma and the resonator, as well as the conducting elements of the antenna system in the dielectric itself. This provides the first complete simulation for a tunnel communication channel. Noise immunity and communication range studies were conducted for a prospective spacecraft radio line.

show abstract

“…Many studies examine the radar detection of hypersonic target enveloped by plasma sheath [28,29]. The RCS [30,31] and the one-dimension range profile [32,33] of hypersonic target covered by plasma sheath are explored and false target phenomenon is found. However, radar detection of hypersonic target enveloped by plasma sheath is quite different from the study in this paper.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Hypersonic Platform-Borne SAR Imaging: A Physical Perspective

Song

Bai

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

The usage of a hypersonic platform for remote sensing application has promising prospects, especially for hypersonic platform-borne synthetic aperture radar (SAR) imaging. However, the high-speed of hypersonic platform will lead to extreme friction between the platform and air, which will cause the ionization of air. The ionized gas forms the plasma sheath wrapped around the hypersonic platform. The plasma sheath will severely affect the propagation of SAR signal and further affect the SAR imaging. Therefore, hypersonic platform-borne SAR imaging should be studied from a physical perspective. In this paper, hypersonic platform-borne SAR imaging under plasma sheath is analyzed. The SAR signal propagation in plasma sheath is computed using scatter matrix method. The proposed SAR signal model is verified by using a ground experiment system. Moreover, the effect of attenuation caused by plasma sheath on SAR imaging is studied under different SAR parameters and plasma sheath. The result shows that attenuation caused by plasma sheath will degrade the SAR imaging quality and even cause the point and area targets to be submerged into the noise. The real SAR images under plasma sheath also illustrate this phenomenon. Furthermore, by studying imaging results under different SAR and plasma parameters, it can be concluded that the severe degradation of SAR imaging quality appears at condition of high plasma sheath electron density and low SAR carrier frequency. The work in this paper will be beneficial for the study of hypersonic platform-borne SAR imaging and design of hypersonic SAR imaging systems in the future.

show abstract

Analyses of Electromagnetic Properties of a Hypersonic Object With Plasma Sheath

Cited by 37 publications

References 38 publications

A self-consistent method for the simulation of meteor trails with an application to radio observations

A self-consistent method for the simulation of meteor trails with an application to radio observations

Issues with Modeling a Tunnel Communication Channel through a Plasma Sheath

Analysis of Hypersonic Platform-Borne SAR Imaging: A Physical Perspective

Contact Info

Product

Resources

About