Radio frequency attenuation by a rocket plume using diffraction theory and finite element modeling

Abstract

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Transmission characteristics of microwave in a coaxial hollow cathode glow discharge weakly ionized dusty plasma study

“…These polarized charges will enhance the effect of electric field, making the relative dielectric constant increase. The attenuation constant of microwave propagation in dusty plasma in the frequency range of 4 ~ 6GHz can be calculated by substituting the above calculated results of conductivity and relative dielectric constant into equation (9), and the attenuation amount can be further calculated according to (15). Select the typical values of the measured data for calculation, take , and the calculated attenuation results are shown in Figure 5.…”

“…For the sake of simplicity of description, it is described as dust plasma below. For example, the dust particles produced in the process of plasma etching semiconductor chips lead to the phenomenon of chip surface contamination [1] ; The ionosphere and ice particles suspended in it form dust plasma, which leads to the phenomenon of high frequency radar echoes in summer in the polar middle layer [2,3] (Polar Mesosphere Summer Echoes, abbreviated as PMSE); In addition to electrons and ions, the solid rocket jet also contains micro-nanoparticles produced by combustion, which are also typical dust plasma [4][5][6][7] ; The plasma sheath produced by the high-speed flight of the spacecraft returning to the earth also contains dust particles produced by ablation [8][9][10] . Many of the above-mentioned problems encountered in the communication field and industrial field need to be explained by the relevant theory of dust plasma.…”

Programa Computacional para Cálculo de Radioenlaces de Foguetes de Sondagem

“…em que 𝜆 é o comprimento de onda no espaço livre na frequência 𝑓. Vale notar que na modelagem apresentada, não foram contabilizados efeitos de atenuações atmosférica e de pluma [13], nem os oriundos de obstáculos e multicaminhos.…”