MEASUREMENT OF DIELECTRIC LOSS OF ICE Ih AT MICROWAVE FREQUENCIES WITH CAVITY RESONATOR
スポンサーリンク
概要
- 論文の詳細を見る
The relative complex dielectric permittivity (ε^*=ε′-iε″) of ice Ih was measured at 5GHz and 10GHz by the cavity resonator method in the temperature range -60℃ to -3℃. The purpose of this study was to clarify the temperature dependence and frequency dependence of dielectric loss (tanδ=ε″/ε′) of ice at microwave frequencies. Because the values of dielectric loss of ice strongly contribute to the penetration depth of microwaves in ice, investigation of the dielectric loss of ice is important for analysis of microwave remote sensing data of the cryosphere. The cavity resonator method is suitable for low loss materials such as ice. Ice samples were polycrystalline and made from distilled and deionized water. The experimental results were as follows : The values of dielectric loss increased as the temperature increased. The values were 1.0∿2.2×(10)^<-4> at 10GHz and 0.6∿1.4×(10)^<-4> at 5GHz in the temperature range -60℃ to -3℃. The gradients of dielectric loss versus temperature (dtanδ/dT) also increased as the temperature increased. The values of penetration depth in ice at 5GHz and 10GHz were about 80m and 14m at -60℃, 35m and 10m at -3℃, respectively.
- 国立極地研究所の論文
著者
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Mae Shinji
Department of Applied Physics, Hokkaido University
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Fujita Shuji
Department of Applied Physics, Hokkaido University
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Morimoto S
National Institute Of Polar Research Organization Of Information And Systems
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Morimoto Shinji
National Institute of Polar Research
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Morimoto S
National Inst. Polar Res. Tokyo Jpn
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Fujita Shuji
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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Mae S
National Institute Of Polar Research Research Organization Of Information And Systems
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MATSUOKA Takeshi
Department of Internal Medicine 5, Tokyo Medical Unvierstiy
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Mae Shinji
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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MORISHIMA Shigenori
Department of Applied Physics, Faculty of Engineering, Hokkaido University
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Matsuoka Takeshi
Department Of Applied Physics Faculty Of Engineering Hokkaido University:(present Address)communicat
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Mae S
Hokkaido Univ. Sapporo
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Morishima Shigenori
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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