| 講演名 | 2022-12-16 Radar Target Modeling by Employing Directional Point Source 小林 弘一(波動システム研), 小田 浩久(綜合電子), |
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| 抄録(和) | Electromagnetic scattering analysis using the point source is the most useful and simple method to evaluate radar performance, especially in imaging such as SAR and ISAR. In this case, we usually employ the point source as an omni-directional very small point scatterer. When calculating the radar image by point sources located on the surrounding outer boundary of the target, the point source modeling cannot sufficiently simulate actual scattering because of the scattering wave to the object inside due to their omni-directivity. In this paper, we propose a new concept that the added directional weighting function to the point source scatterer usually with omni-pattern, which leads a simple and low-cost method especially in radar image. The outside boundary of the radar target can be specifically expressed by an equation or positions of the spatial coordinates. Introducing a local coordinate around the regarding area so that deriving the outward normal vector, the point source can add the directional characteristics such as cosine pattern with arbitrary amplitude and phase information. Thus, it is considered that the analysis accuracy can be improved even with a point scatterer for 3D model that discretizes the actual outer shape of the target while keeping the computational cost relatively low. For the confirmation of this proposed method, we numerically calculate the 2D bistatic model of a conducting cylinder. |
| 抄録(英) | Electromagnetic scattering analysis using the point source is the most useful and simple method to evaluate radar performance, especially in imaging such as SAR and ISAR. In this case, we usually employ the point source as an omni-directional very small point scatterer. When calculating the radar image by point sources located on the surrounding outer boundary of the target, the point source modeling cannot sufficiently simulate actual scattering because of the scattering wave to the object inside due to their omni-directivity. In this paper, we propose a new concept that the added directional weighting function to the point source scatterer usually with omni-pattern, which leads a simple and low-cost method especially in radar image. The outside boundary of the radar target can be specifically expressed by an equation or positions of the spatial coordinates. Introducing a local coordinate around the regarding area so that deriving the outward normal vector, the point source can add the directional characteristics such as cosine pattern with arbitrary amplitude and phase information. Thus, it is considered that the analysis accuracy can be improved even with a point scatterer for 3D model that discretizes the actual outer shape of the target while keeping the computational cost relatively low. For the confirmation of this proposed method, we numerically calculate the 2D bistatic model of a conducting cylinder. |
| キーワード(和) | 点波源 / 指向性パターン / バイスタティック散乱 / SAR/ISAR画像処理 / レーダ断面積 (RCS) / 近傍界遠方変換 (NFFFT) |
| キーワード(英) | point source / directional pattern / bistatic scattering / SAR/ISAR imaging / radar cross-section (RCS) / near-field to far-field transformation (NFFFT). |
| 資料番号 | SANE2022-76 |
| 発行日 | 2022-12-08 (SANE) |
| 研究会情報 | |
| 研究会 | SANE |
|---|---|
| 開催期間 | 2022/12/15(から2日開催) |
| 開催地（和） | 長崎ブリックホール |
| 開催地（英） | Nagasaki Public Hall |
| テーマ（和） | ICSANE |
| テーマ（英） | ICSANE |
| 委員長氏名（和） | 森山 敏文(長崎大) |
| 委員長氏名（英） | Toshifumi Moriyama(Nagasaki Univ.) |
| 副委員長氏名（和） | 田中 真(東海大) / 網嶋 武(明大) |
| 副委員長氏名（英） | Makoto Tanaka(Tokai Univ.) / Takeshi Amishima(Meiji Univ.) |
| 幹事氏名（和） | 二ッ森 俊一(電子航法研) / 北村 尭之(三菱電機) |
| 幹事氏名（英） | Shunichi Futatsumori(ENRI) / Takayuki Kitamura(Mitsubishi Electric) |
| 幹事補佐氏名（和） | 尚 方(電通大) |
| 幹事補佐氏名（英） | Shang Fang(Univ. of Electro-Comm) |
| 講演論文情報詳細 | |
| 申込み研究会 | Technical Committee on Space, Aeronautical and Navigational Electronics |
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| 本文の言語 | ENG |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Radar Target Modeling by Employing Directional Point Source |
| サブタイトル（和） | |
| キーワード(1)（和/英） | 点波源 / point source |
| キーワード(2)（和/英） | 指向性パターン / directional pattern |
| キーワード(3)（和/英） | バイスタティック散乱 / bistatic scattering |
| キーワード(4)（和/英） | SAR/ISAR画像処理 / SAR/ISAR imaging |
| キーワード(5)（和/英） | レーダ断面積 (RCS) / radar cross-section (RCS) |
| キーワード(6)（和/英） | 近傍界遠方変換 (NFFFT) / near-field to far-field transformation (NFFFT). |
| 第 1 著者 氏名（和/英） | 小林 弘一 / Hirokazu Kobayashi |
| 第 1 著者 所属（和/英） | 波動システム研究所(略称：波動システム研) Electromagnetic Wave System Laboratories(略称：Electromagnetic Wave System Lab.) |
| 第 2 著者 氏名（和/英） | 小田 浩久 / Hirohisa Oda |
| 第 2 著者 所属（和/英） | 綜合電子株式会社(略称：綜合電子) SOGO Electronics, Inc.(略称：SOGO) |
| 発表年月日 | 2022-12-16 |
| 資料番号 | SANE2022-76 |
| 巻番号（vol） | vol.122 |
| 号番号（no） | SANE-312 |
| ページ範囲 | pp.68-73(SANE), |
| ページ数 | 6 |
| 発行日 | 2022-12-08 (SANE) |