Analysis on the Propagation Characteristics of Terahertz Signals in Blunt-Coned and Sharp-Coned Vehicle in Different Sizes

IF 1.3 4区 物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS IEEE Transactions on Plasma Science Pub Date : 2024-09-10 DOI:10.1109/TPS.2024.3451064
Pingsheng Liu;Ziyang Zhao;Kai Yuan;Zhikang Chu;Rongxin Tang
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Abstract

In the recent decade, Terahertz (THz) communication has been recognized as one of the possible paths to solve the communication blackout for reentry vehicles. Previous studies have mainly focused on the plasma structure and Terahertz signal propagation mechanisms of vehicle of the same model. However, actual vehicle comes in various sizes, necessitating further research into the relationship between different-sized vehicle and Terahertz signal transmission characteristics. This study takes typical RAM-C blunt-coned and pointed-coned vehicles as objects to analyze the impact of vehicle size changes on plasma sheath parameters. The propagation characteristics of Terahertz signals in plasma sheaths of different sizes were studied using the scattering matrix method (SMM) method. The analysis conclusion indicates that as the size of blunt-coned and sharp-coned vehicles increases, the thickness of the plasma sheath layer also increases, resulting in more severe attenuation of Terahertz signals. Increasing the size of the vehicle enhances electron collision frequency, while the fluctuation in maximum electron density increases with the size of blunt-coned vehicle and decreases with the size of sharp-coned vehicle. In the Terahertz signal transmission characteristics, blunt-coned vehicles are mainly affected by signal absorption, while sharp-coned cone vehicles are affected by both reflection and absorption. Reducing the size of the vehicle and the thickness of the plasma sheath layer can mitigate Terahertz signal attenuation.
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太赫兹信号在不同尺寸的钝锥形和锐锥形车辆中的传播特性分析
近十年来,太赫兹(THz)通信已被认为是解决再入飞行器通信中断问题的可能途径之一。以往的研究主要集中于同一模型飞行器的等离子体结构和太赫兹信号传播机制。然而,实际飞行器有多种尺寸,因此有必要进一步研究不同尺寸飞行器与太赫兹信号传输特性之间的关系。本研究以典型的 RAM-C 钝锥和尖锥飞行器为研究对象,分析飞行器尺寸变化对等离子体鞘参数的影响。利用散射矩阵法(SMM)研究了太赫兹信号在不同尺寸等离子体鞘中的传播特性。分析结论表明,随着钝锥形和尖锥形飞行器尺寸的增大,等离子体鞘层的厚度也随之增大,从而导致太赫兹信号的衰减更加严重。载流子尺寸的增大会提高电子碰撞频率,而最大电子密度的波动会随钝锥载流子尺寸的增大而增大,随锐锥载流子尺寸的增大而减小。在太赫兹信号传输特性方面,钝锥载体主要受信号吸收的影响,而尖锥载体则同时受反射和吸收的影响。减小飞行器的尺寸和等离子体鞘层的厚度可以减轻太赫兹信号衰减。
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来源期刊
IEEE Transactions on Plasma Science
IEEE Transactions on Plasma Science 物理-物理:流体与等离子体
CiteScore
3.00
自引率
20.00%
发文量
538
审稿时长
3.8 months
期刊介绍: The scope covers all aspects of the theory and application of plasma science. It includes the following areas: magnetohydrodynamics; thermionics and plasma diodes; basic plasma phenomena; gaseous electronics; microwave/plasma interaction; electron, ion, and plasma sources; space plasmas; intense electron and ion beams; laser-plasma interactions; plasma diagnostics; plasma chemistry and processing; solid-state plasmas; plasma heating; plasma for controlled fusion research; high energy density plasmas; industrial/commercial applications of plasma physics; plasma waves and instabilities; and high power microwave and submillimeter wave generation.
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