Analysis of an Electromagnetic Mitigation Scheme for Reentry Telemetry Through Plasma
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In this paper, an electromagnetic E? B layer approach is proposed to reduce the plasma number density of the plasma layer, and an electrostatic plasma sheath is also proposed to deal with the radio blackout problem.Abstract:
During hypersonic reentry flight, the shock heated air generates a weakly ionized plasma layer. Because the weakly ionized plasma layer has a high plasma number density, it causes an important systems operation problem that is known as a communication, or radio, blackout. The radio blackout occurs when the plasma frequency of the plasma layer is higher than a radio wave frequency. In this case, the radio wave signals to and from the vehicle are reflected or attenuated so that the vehicle loses voice communication, data telemetry, and Global Positioning System navigation. The radio blackout problem can be solved by reducing the plasma number density of the plasma layer because the plasma frequency is mainly related to the plasma number density of the plasma layer. To reduce the plasma number density of the plasma layer, an electromagnetic E ? B layer approach is proposed. The proposed ExB layer is analyzed by a two-dimensional model. It suggests that an E ? B layer can be used to allow transmission of the communication signals through the plasma layer. We also propose an alternative to reduce the plasma density, based on an electrostatic plasma sheath.read more
Citations
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Journal ArticleDOI
Electromagnetic Reduction of Plasma Density During Atmospheric Reentry and Hypersonic Flights
TL;DR: In this paper, an E? B crossed-field configuration is proposed to reduce the plasma density at large altitudes, and the benefits of the reduced plasma density in terms of electromagnetic wave absorption across the plasma layer are estimated.
Review of Leading Approaches for Mitigating Hypersonic Vehicle Communications Blackout and a Method of Ceramic Particulate Injection Via Cathode Spot Arcs for Blackout Mitigation
TL;DR: In this article, the authors present a unique approach for mitigating the blackout communications problem, which involves the injection of ceramic metaloxide particulate into a simulated reentry plasma to quench the reentry plasmasheath.
Journal ArticleDOI
Modeling of electromagnetic manipulation of plasmas for communication during reentry flight
TL;DR: In this paper, a configuration of an E B layer as a reentry blackout mitigation method was proposed, where the manipulated plasma region provides a possibility to communicate through a plasma layer during a Reentry blackout.
Journal ArticleDOI
Propagation of terahertz electromagnetic wave in plasma with inhomogeneous collision frequency
TL;DR: In this article, the absorption spectra of terahertz electromagnetic wave in plasma with inhomogeneous collision frequency was investigated and profiles were introduced to describe the non-uniformity of collision frequency.
Journal ArticleDOI
Re-entry communication through a plasma sheath using standing wave detection and adaptive data rate control
TL;DR: In this article, a simple and practicable communication method is proposed on the basis that the electromagnetic-wave backscatter of the plasma sheath affects the voltage standing wave ratio (VSWR) of the antenna.
References
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