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| 講演名 | 2019-11-01 14:00 Depolarization of Scattering From a Spatially Anisotropic Rough Surface With Inhomogeneous Dielectric Profile ○Ying Yang（GLUT）・Kun-Shan Chen・Guofei Shang・Zhao-Liang Li（Hebei GEO Univ.）  SANE2019-69 |
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| 抄録 | （和） | Abstract Depolarized response is an inherent feature of electromagnetic (EM) waves providing the physical interpretation from radar observations of natural surface, which is inclined to be spatially anisotropic and inhomogeneous. This paper presents depolarized scattering from natural surfaces, in which the inhomogeneity is modeled by dielectric profiles. The spatial anisotropy is statistically described by directional correlation function. The advanced integral equation method (AIEM) is used to simulate the scattering coefficient. Numerical results show that the linearly polarized scattering reveals stronger directional dependence, and the circularly polarized scattering tends to be more omnidirectional and its scattering pattern resembles ?concentric circles? around the specular direction. In virtue of dielectric inhomogeneity, the HH polarized scattering pattern exhibits a stronger angular dependence than the VV does. Quantitatively, the VV polarization is smaller than the HH polarization near the specular direction, but elsewhere, it is notably larger than HH. The HV and VH scattering coefficients cluster in the cross plane when scattering angle is small. For circular polarization, LR polarized scattering is smaller than RR polarization. The depolarized scattering patterns from the inhomogeneous rough surfaces with different dielectric profiles are similar at linearly polarized incidence, but are quite different at right-hand circular polarization (RHCP) incidence. That is, for different inhomogeneous surface structures, polarization conversion is less efficient at linearly polarized incidence than at circularly polarized incidence. Moreover, as the polarization state of the incident wave changes, the depolarized scattering characteristics varies correspondingly. For vertically polarized incidence, the depolarized scattering is greater in backward region with larger scattering angle, and is stronger at cross plane but with smaller scattering angle. For horizontally polarized incidence, the depolarized scattering is stronger in backward region. Numerical results confirms that the anisotropy and inhomogeneity of the surface effectively prompt the polarization conversion. The depolarized mechanism is potentially useful to predict and interpret the scattering behaviors from the natural soil surface, where the strong anisotropy commonly presents because of plowing and the dielectric inhomogeneity. |
| （英） | Abstract Depolarized response is an inherent feature of electromagnetic (EM) waves providing the physical interpretation from radar observations of natural surface, which is inclined to be spatially anisotropic and inhomogeneous. This paper presents depolarized scattering from natural surfaces, in which the inhomogeneity is modeled by dielectric profiles. The spatial anisotropy is statistically described by directional correlation function. The advanced integral equation method (AIEM) is used to simulate the scattering coefficient. Numerical results show that the linearly polarized scattering reveals stronger directional dependence, and the circularly polarized scattering tends to be more omnidirectional and its scattering pattern resembles ?concentric circles? around the specular direction. In virtue of dielectric inhomogeneity, the HH polarized scattering pattern exhibits a stronger angular dependence than the VV does. Quantitatively, the VV polarization is smaller than the HH polarization near the specular direction, but elsewhere, it is notably larger than HH. The HV and VH scattering coefficients cluster in the cross plane when scattering angle is small. For circular polarization, LR polarized scattering is smaller than RR polarization. The depolarized scattering patterns from the inhomogeneous rough surfaces with different dielectric profiles are similar at linearly polarized incidence, but are quite different at right-hand circular polarization (RHCP) incidence. That is, for different inhomogeneous surface structures, polarization conversion is less efficient at linearly polarized incidence than at circularly polarized incidence. Moreover, as the polarization state of the incident wave changes, the depolarized scattering characteristics varies correspondingly. For vertically polarized incidence, the depolarized scattering is greater in backward region with larger scattering angle, and is stronger at cross plane but with smaller scattering angle. For horizontally polarized incidence, the depolarized scattering is stronger in backward region. Numerical results confirms that the anisotropy and inhomogeneity of the surface effectively prompt the polarization conversion. The depolarized mechanism is potentially useful to predict and interpret the scattering behaviors from the natural soil surface, where the strong anisotropy commonly presents because of plowing and the dielectric inhomogeneity. | |
| キーワード | （和） | Depolarization / anisotropy / inhomogeneous / scattering / rough surface / / / |
| （英） | Depolarization / anisotropy / inhomogeneous / scattering / rough surface / / / | |
| 文献情報 | 信学技報, vol. 119, no. 255, SANE2019-69, pp. 107-111, 2019年10月. | |
| 資料番号 | SANE2019-69 | |
| 発行日 | 2019-10-24 (SANE) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | SANE2019-69 |
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| 研究会情報 | |
| 研究会 | SANE |
| 開催期間 | 2019-10-31 - 2019-11-01 |
| 開催地（和） | 韓国（済州島） |
| 開催地（英） | KOREA (Jeju) |
| テーマ（和） | ICSANE2019 |
| テーマ（英） | ICSANE2019 |
| 講演論文情報の詳細 | |
| 申込み研究会 | SANE |
| 会議コード | 2019-10-SANE |
| 本文の言語 | 英語 |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Depolarization of Scattering From a Spatially Anisotropic Rough Surface With Inhomogeneous Dielectric Profile |
| サブタイトル（英） | |
| キーワード(1)（和/英） | Depolarization / Depolarization |
| キーワード(2)（和/英） | anisotropy / anisotropy |
| キーワード(3)（和/英） | inhomogeneous / inhomogeneous |
| キーワード(4)（和/英） | scattering / scattering |
| キーワード(5)（和/英） | rough surface / rough surface |
| キーワード(6)（和/英） | / |
| キーワード(7)（和/英） | / |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | Ying Yang / Ying Yang / |
| 第1著者 所属（和/英） | Guilin University of Technology (略称： GLUT) Guilin University of Technology (略称： GLUT) |
| 第2著者 氏名（和/英/ヨミ） | Kun-Shan Chen / Kun-Shan Chen / |
| 第2著者 所属（和/英） | Hebei GEO University (略称： Hebei GEO Univ.) Hebei GEO University (略称： Hebei GEO Univ.) |
| 第3著者 氏名（和/英/ヨミ） | Guofei Shang / Guofei Shang / |
| 第3著者 所属（和/英） | Hebei GEO University (略称： Hebei GEO Univ.) Hebei GEO University (略称： Hebei GEO Univ.) |
| 第4著者 氏名（和/英/ヨミ） | Zhao-Liang Li / Zhao-Liang Li / |
| 第4著者 所属（和/英） | Hebei GEO University (略称： Hebei GEO Univ.) Hebei GEO University (略称： Hebei GEO Univ.) |
| 講演者 | 第1著者 |
| 発表日時 | 2019-11-01 14:00:00 |
| 発表時間 | 20分 |
| 申込先研究会 | SANE |
| 資料番号 | SANE2019-69 |
| 巻番号（vol） | vol.119 |
| 号番号（no） | no.255 |
| ページ範囲 | pp.107-111 |
| ページ数 | 5 |
| 発行日 | 2019-10-24 (SANE) |
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