电力不足条件下有源太赫兹成像系统的建模

Modeling of an active terahertz imaging system in brownout conditions.

作者信息

Prophète Clotilde, Pierrat Romain, Sik Hervé, Kling Emmanuel, Carminati Rémi, de Rosny Julien

出版信息

Appl Opt. 2018 Jul 20;57(21):6017-6026. doi: 10.1364/AO.57.006017.

DOI:10.1364/AO.57.006017

Abstract

We present a theoretical evaluation of a subterahertz (subTHz) system to image through a scattering medium composed of scatterers of sizes close to the wavelength. We specifically study the case of sand grain clouds created by helicopter rotor airflow during landing in arid areas. The different powers received by one pixel of a matrix made of subTHz sensors are identified. Photometric and antenna-based sensors are considered. Besides the thermal contribution to the noise, we focus our attention on the radiation backscattered by the brownout. It appears that a configuration where the source and the camera are distant is the most promising configuration and is realistic for embedded systems.

摘要

我们对一个太赫兹以下（subTHz）系统进行了理论评估，该系统用于透过由尺寸接近波长的散射体组成的散射介质进行成像。我们特别研究了在干旱地区直升机着陆期间由直升机旋翼气流产生的沙粒云的情况。确定了由太赫兹以下传感器组成的矩阵中一个像素接收到的不同功率。考虑了基于光度和基于天线的传感器。除了热噪声贡献外，我们将注意力集中在由尘卷风反向散射的辐射上。结果表明，源和相机距离较远的配置是最有前景的配置，并且对于嵌入式系统来说是现实可行的。