Analysis on the propagation characteristics of the EM wave in the nonuniform magnetized plasma sheath
A novel FDTD method, Shift-Operator Finite Difference Time-Domain (SO-FDTD) is promoted. Propagator matrix method (PMM) is successfully utilized to study the propagation characteristics of EM waves in the nonuniform magnetized plasma sheath model of blunt cone. The results of the two methods are compared and both of results indicate that the external magnetic field changes propagation characteristics of EM waves in plasma, broadens the transmission bandwidth and improves the transmissivity of EM waves, which can be perfectly applied in re-entry communications.
A conception on the terahertz communication system for plasma sheath penetration
The signal of a hypersonic spacecraft entering the earth's atmosphere may be lost at a certain altitude transitorily. This phenomenon is called ‘blackout’, which is an important performance of aircraft design. Recently, with the development of the near spacecraft, the communication techniques under the plasma environment are more and more important, with the realization of which can we record, monitor, track and capture the near spacecraft. In this paper, we put forward an idea based on that the radiation from the terahertz communication system can penetrate the plasma sheath, to provide the theoretical basis for real-time communicating with the near spacecraft.
Nonobstetric lower genital tract injuries in rural India
To study the impact of nonobstetric genital tract injury (NOGTI) in rural India.