Low-THz transmission through water-containing contaminants on antenna radome

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@article{69fb9a94eae942ccb1185067839b81ee,
title = "Low-THz transmission through water-containing contaminants on antenna radome",
abstract = "In this paper, signal reduction due to the presence of water content formed on a radome has been studied at low-THz frequencies. The effect of obscurants on signal reduction has been characterized by measuring the ratio of reflected signals from a reference target through the radome, with contaminant and without contaminant. All the measurements have been compared to theoretical models, demonstrating a reasonable agreement. Water is the most common obscurant in outdoor applications and the main cause of performance deterioration in rainy, snowy, and foggy weather. This paper concentrates on the attenuation caused by different forms of distribution of water as a radome contaminant. Both a thin uniform layer of water and randomly distributed water droplets are studied at 150 and 300 GHz. The results show strong signal reduction due to the presence of uniform thickness of water and higher signal reduction with increasing frequency. However, the measured transmissivity through distributed water droplets, which occur in practice due to the surface tension of water, shows lower transmission loss at the shorter wavelength, due to transmission through the distribution of gaps between droplets.",
keywords = "Diffraction, loss measurement, refractive index, submillimeter-wave propagation",
author = "Fatemeh Norouzian and Rui Du and Hoare, {Edward G.} and Peter Gardner and Costas Constantinou and Mikhail Cherniakov and Marina Gashinova",
year = "2018",
month = jan,
doi = "10.1109/TTHZ.2017.2778498",
language = "English",
volume = "8",
pages = "63--75",
journal = "IEEE Transactions on Terahertz Science and Technology",
issn = "2156-342X",
publisher = "IEEE Xplore",
number = "1",

}

RIS

TY - JOUR

T1 - Low-THz transmission through water-containing contaminants on antenna radome

AU - Norouzian, Fatemeh

AU - Du, Rui

AU - Hoare, Edward G.

AU - Gardner, Peter

AU - Constantinou, Costas

AU - Cherniakov, Mikhail

AU - Gashinova, Marina

PY - 2018/1

Y1 - 2018/1

N2 - In this paper, signal reduction due to the presence of water content formed on a radome has been studied at low-THz frequencies. The effect of obscurants on signal reduction has been characterized by measuring the ratio of reflected signals from a reference target through the radome, with contaminant and without contaminant. All the measurements have been compared to theoretical models, demonstrating a reasonable agreement. Water is the most common obscurant in outdoor applications and the main cause of performance deterioration in rainy, snowy, and foggy weather. This paper concentrates on the attenuation caused by different forms of distribution of water as a radome contaminant. Both a thin uniform layer of water and randomly distributed water droplets are studied at 150 and 300 GHz. The results show strong signal reduction due to the presence of uniform thickness of water and higher signal reduction with increasing frequency. However, the measured transmissivity through distributed water droplets, which occur in practice due to the surface tension of water, shows lower transmission loss at the shorter wavelength, due to transmission through the distribution of gaps between droplets.

AB - In this paper, signal reduction due to the presence of water content formed on a radome has been studied at low-THz frequencies. The effect of obscurants on signal reduction has been characterized by measuring the ratio of reflected signals from a reference target through the radome, with contaminant and without contaminant. All the measurements have been compared to theoretical models, demonstrating a reasonable agreement. Water is the most common obscurant in outdoor applications and the main cause of performance deterioration in rainy, snowy, and foggy weather. This paper concentrates on the attenuation caused by different forms of distribution of water as a radome contaminant. Both a thin uniform layer of water and randomly distributed water droplets are studied at 150 and 300 GHz. The results show strong signal reduction due to the presence of uniform thickness of water and higher signal reduction with increasing frequency. However, the measured transmissivity through distributed water droplets, which occur in practice due to the surface tension of water, shows lower transmission loss at the shorter wavelength, due to transmission through the distribution of gaps between droplets.

KW - Diffraction

KW - loss measurement

KW - refractive index

KW - submillimeter-wave propagation

UR - http://www.scopus.com/inward/record.url?scp=85039788128&partnerID=8YFLogxK

U2 - 10.1109/TTHZ.2017.2778498

DO - 10.1109/TTHZ.2017.2778498

M3 - Article

AN - SCOPUS:85039788128

VL - 8

SP - 63

EP - 75

JO - IEEE Transactions on Terahertz Science and Technology

JF - IEEE Transactions on Terahertz Science and Technology

SN - 2156-342X

IS - 1

ER -