講演抄録/キーワード |
講演名 |
2007-03-09 15:40
Application of the Locality Principle in the Method of Moments for Induced Currents or Fields in Electrically Large Scattering Problems ○Tetsu Shijo・Masayuki Oishi・Yoichi Katakai・Nobutaka Omaki・Koji Yukimasa・Luis Rodriguez・Makoto Ando(Tokyo Inst. of Tech.) AP2006-169 |
抄録 |
(和) |
高周波近似解法の近似概念である局所性を応用して,モーメント法の計算コストを低減する.散乱界を求める際に,ある観測点に寄与する電流分布は,局所的である.GTDなどの高周波近似解法は局所性に着目して,回折波などを近似して散乱界を得る.この考えを応用し,端部および内部停留点近傍の電流分布のみをモーメント法を用いて解く.また,焦点系など停留点が広範囲におよぶ範囲は,従来ある物理光学近似との混合解法を適用する.2つの手法を補完しながら計算する手法を提案する |
(英) |
The computational cost reduction in the Method of Moments (MoM) is proposed in terms of the locality principle which is the concept of the high frequency approximation techniques. In terms of locality, this article is focused in two types; the first is related with the currents such as the Physical Optics (PO) and the other for the fields like the Geometrical Theory of Diffraction (GTD). Former locality leads to the novel criterion of the switching between the PO region and the MoM region in the PO-MoM hybrid method, which is based upon the Fresnel zone number. By the use of the later locality, the scattering field is given by solving the currents not on the entire region but on the local areas which correspond near the inner and edge stationary phase points as is defined in the GTD. Finally, hybrid method utilized each proposed locality properties which increases effectiveness due to complement each other. |
キーワード |
(和) |
モーメント法 / 物理光学近似 / 幾何光学的回折理論 / レーダ断面積 / / / / |
(英) |
Method of Moments / Physical Optics / Geometrical Theory of Diffraction / Radar cross section / / / / |
文献情報 |
信学技報, vol. 106, no. 561, AP2006-169, pp. 109-112, 2007年3月. |
資料番号 |
AP2006-169 |
発行日 |
2007-03-01 (AP) |
ISSN |
Print edition: ISSN 0913-5685 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 |
AP2006-169 |