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Reduction Techniques of Undesired Electromagnetic Radiation Using DNG Materials

使用 DNG 材料减少不良电磁辐射的技术

基本信息

批准号：
18560270
负责人：
UNO Toru
金额：
$ 2.32万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

It is very important for reducing undesired electromagnetic radiations using the DNG materials that how to realize appropriate electric and magnetic properties of the materials, and where the materials are set up. In this research, their fundamentals were investigated theoretically and experimentally. First, the basic properties of electromagnetic fields near the DNG slab were clarified by deriving an exact dyadic Green's function. For numerical simulations for the DNG materials, the FDTD method was improved for calculating the periodic structures effectively. Next, the lossy DNG materials could be synthesized chemically, we proposed a novel structure in which many conducting square plates are arranged periodically on an interface of a usual lossy material. Using this Electromagnetic Band-Gap structure, we made a new electromagnetic absorber. It has been found that this structure absorbs effectively and for wide frequency range. However it is necessary to reduce their sizes for practical uses. In this research, the representative unified the whole activity and studied theoretically the electric and magnetic properties and structures of the DNG materials, and proposed suitable structures for reducing the undesired electromagnetic radiation. A member of this research established the numerical simulation methods for DNG materials, and verified the effectiveness of the proposed techniques numerically and experimentally.

如何实现DNG材料合适的电磁性能，以及材料的设置位置，对于DNG材料降低电磁辐射是非常重要的。本研究从理论和实验两个方面对它们的基本原理进行了研究。首先，通过推导一个精确的并矢绿色函数，阐明了双介质平板附近电磁场的基本性质。在数值模拟中，对FDTD方法进行了改进，使其能够有效地计算周期结构。其次，我们提出了一种新的结构，在这种结构中，许多导电的正方形板周期性地排列在一种通常的有耗材料的界面上。利用这种电磁带隙结构，我们制作了一种新型的电磁吸收体。已经发现，这种结构有效地吸收，并且用于宽的频率范围。然而，为了实际应用，有必要减小它们的尺寸。在这项研究中，代表统一了整个活动，并从理论上研究了DNG材料的电和磁性能和结构，并提出了减少不希望的电磁辐射的合适结构。本研究的一名成员建立了DNG材料的数值模拟方法，并通过数值和实验验证了所提出的技术的有效性。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

An Analysis of Dispersive Material by CIP (Constrained Interpolation Profile) method

用CIP（约束插值轮廓）法分析色散材料

DOI：
发表时间：
2008
期刊：
Proc. International Workshop on Antenna Technology 2008
影响因子：
0
作者：
Takuji;Arima;Toru;Uno
通讯作者：
Uno

Comparison of FT-FDTD and Spectral Domain FDTD for Periodic Structures

DOI：
10.1109/iwat.2008.4511317
发表时间：
2008-03
期刊：
2008 International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials
影响因子：
0
作者：
K. Toyoda;T. Uno;T. Arima
通讯作者：
K. Toyoda;T. Uno;T. Arima

Application of EBG Structure to the Reduction of Undesired EM Radiation

应用 EBG 结构减少不需要的电磁辐射