Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1996-09-01 |
タイトル |
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タイトル |
PRECISE MEASUREMENT OF DIELECTRIC LOSS OF ICE AT 5-40 GHz |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ID登録 |
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ID登録 |
10.15094/00003939 |
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ID登録タイプ |
JaLC |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
記事種別(英) |
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en |
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ABSTRACT |
論文名よみ |
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その他のタイトル |
PRECISE MEASUREMENT OF DIELECTRIC LOSS OF ICE AT 5-40 GHz |
著者名よみ |
マツオカ, タケシ
フジタ, シュウジ
モリシマ, シゲノリ
マエ, シンジ
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著者名(英) |
MATSUOKA, Takeshi
FUJITA, Shuji
MORISHIMA, Shigenori
MAE, Shinji
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著者所属(英) |
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en |
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Department of Applied Physics, Faculty of Engineering, Hokkaido University |
著者所属(英) |
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en |
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Department of Applied Physics, Faculty of Engineering, Hokkaido University |
著者所属(英) |
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en |
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Department of Applied Physics, Faculty of Engineering, Hokkaido University |
著者所属(英) |
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en |
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Department of Applied Physics, Faculty of Engineering, Hokkaido University |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
The relative complex dielectric permittivity, ε^*=ε′-iε″, of ice has been measured in the frequency range 5 GHz to 40 GHz and temperature range -80 to -10℃. So far, knowledge about the dielectric loss, tanδ=ε″/ε′, of ice which governs the attenuation of the propagating wave has been unsatisfactory at microwave frequencies. It is important to investigate the dielectric properties of ice for radar remote sensing applications in a polar environment. In this study, the cavity resonator method at 5,10GHz and the open resonator method at 30-40GHz were used. Both methods are suitable for precise measurement of low loss (∿(10)^<-4>) materials. The result suggests that the dielectric loss of ice at microwave frequencies should increase with increasing frequency and increasing temperature. In general, the values of the dielectric loss at microwave frequencies are characterized by the high-frequency tail of the Debye relaxation spectrum with a relaxation frequency in the kHz range and low-frequency tail of the far-infrared absorption band. In this study, the component of the Debye relaxation spectrum is 20% in terms of the value of tanδat 5GHz, -10℃. Then the component of far-infrared absorption band increases with increasing frequency and decreasing temperature. The estimated value of penetration depth in ice, extrapolated to 1 GHz, is 200m at -10℃ and reaches the order of 1000m under -30℃. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA10756213 |
書誌情報 |
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
巻 10,
p. 154,
発行日 1996-09
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出版者 |
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出版者 |
National Institute of Polar Research |