Study of Equivalent Edge Currents in Geometrical

几何中等效边电流的研究

• 批准号: 04452182
• 负责人: ANDO Makoto
• 金额: $ 0.38万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452182/
• 关键词: Method of equivalent edge currents (MEC); Fiotitious penetrating rays; Modified edge representation (MER); High frequency technique; Diffraction; Physical optics (PO); Frings wave (FW); 開口面法; 等価端部電磁流; 物理光学法; 回析理論

The method of equivalent edge ourrents (MEC) extends the applicability of geometrical theory of diffraction (GTD) with the minimum complexity. Fields are expressed in terms of line integration of fictitious line currents called equivalent edge currents (EECg). The accuracy of MEC is greatly dependent upon the quality of expressions of EECs. This work gives two novel concepts and methods for defining EECs for general edge points. "EECs using paths of most rapid phase variation" succeeds in eliminating all the false singularities. "Modified edge representation (MER)" based upon generalized Fermat's principle are proposed and succeeds in defining accurate EECs with only the classical Keller's diffraction coefficients. Following results are obtained.The validity of MER is numerically checked. It has almost the same potential as the UTD, which is known for the highest accuracyMER, as applied to the PO components, gives numerically perfect accuracy in reducing the surface to line integral reduction. MER, as applied to the fringe wave components, causes erroneous results. Simple correction method is proposed, which dispense with special functions such as Fresnel integralsExtraction of lower order diffracted waves by adopting the time gating technique was not successful due to residual reflection in unechoic chamberFictitious penetrating rays in PO is found for the first time. This ray exist in the surface with the curvatureVisualization of diffracted fields in terms of EECs has started and fictitious penetrating rays are demonstrated

等效边流方法以最小的复杂性扩展了几何绕射理论的适用范围。场用虚拟线路电流的线路积分来表示，称为等效边缘电流(EEG)。MEC的准确性在很大程度上依赖于EECS的表达质量。这项工作给出了两个新的概念和方法来定义一般边界点的EECS。“使用最快相变路径的EECS”成功地消除了所有虚假奇点。提出了基于广义费马原理的“修正边缘表示法(MER)”，并成功地用经典的Keller衍射系数定义了精确的EEC。得到了以下结果。对MER的有效性进行了数值校核。它具有与UTD几乎相同的潜力，UTD以最高的精度而闻名。当应用于PO组件时，MER在减少面线积分简化方面提供了完美的数值精度。当应用于条纹波分量时，MER会导致错误的结果。提出了一种简单的校正方法，省去了菲涅耳积分等特殊功能。采用时间选通技术提取低阶衍射波是不成功的，因为在无回声腔中存在残余反射，首次发现了PO中的虚假穿透射线。这种射线存在于具有曲率的表面上。衍射场的EECS可视化已经开始，并演示了虚拟的穿透射线

项目成果

Tsutomu Murasaki: "PO Equivalent Edge Currents for Modified Edge Representation of Flat Plate" IEEE Antennas and Propagation Society International Symposium. 1. 388-391 (1992)

Tsutomu Murasaki：“平板的修改边缘表示的 PO 等效边缘电流”IEEE 天线和传播协会国际研讨会。

大堂 雅之: "反射鏡アンテナの解析における物理光学法と開口面法:-回折理論的考察-" 電子情報通信学会、信学技報. A・P93-69. 35-40 (1993)

Masayuki Odo：“反射器天线分析中的物理光学方法和孔径方法：-衍射理论考虑-”电子、信息和通信工程师学会，IEICE技术报告A·P93-40（1993）。

Makoto Ando Ryokyo Okada and Tsuyoshi Kitaoka: "Comparison of PO and PTD Analyzes of Offset Reflector Antenna Patterns" IEICE Transactions on Communications. Vol.E75-B. 76-81 (1992)

Makoto Ando Ryokyo Okada 和 Tsuyoshi Kitaoka：“偏置反射器天线模式的 PO 和 PTD 分析的比较” IEICE 通信交易。

Makoto Ando, Masayuki Oodo and Tsutomu Murasaki: "Uniform Expression of Equivalent Edge Currents for Physical Optics and Error Correction in Shadow Region" Proceedings of the International Symposium on Antennas and Propagation. 557-560 (1992)

Makoto Ando、Masayuki Oodo 和 Tsutomu Murasaki：“物理光学等效边缘电流的统一表达和阴影区域的误差校正”国际天线与传播研讨会论文集。

Makoto Ando: "Pattern Analysis of a GPS Microstrip Antenna on a Rectangular Ground Plane by using Modified Edge Representation" IEICE Transactions on Communications. (掲載予定). (1994)

Makoto Ando：“使用修改的边缘表示法对矩形地平面上的 GPS 微带天线进行模式分析”IEICE Transactions on Communications（即将出版）。