Research and development of devices with very high performance using electromagnetic crystals

使用电磁晶体研究和开发高性能器件

基本信息

批准号：
20560329
负责人：
JIA Hongting
金额：
$ 3万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2008
资助国家：
日本
起止时间：
2008 至 2011
项目状态：
已结题

项目摘要

This research has proposed an analytical method to analyze electromagnetic crystals composed of ferrite material with anisotropic magnetic permeability and normal materials or metals. Many kinds of electromagnetic crystals with different structures have been investigated. Next, we have given many radiation results from line current source sandwiched by two electromagnetic crystals. The radiation patterns and gains can be controlled by the bias-dc magnetic filed. Next, when an antenna is in electromagnetic crystal, the current distribution on this antenna is affected by the two crystals. We have proposed a novel approach to formulate the radiation from a striate antenna placed in two pieces of two-dimensional electromagnetic crystals. All the electromagnetic fields may be expressed using Green functions, which are derived by the spectral domain approach based on reflected matrices and transmitted matrices. The distribution of electric currents may be calculated by a moment method, and the currents may be calculated by a moment method, and the currents are also transformed into an infinite periodic array of linearly phased dipole in the spectral domain. The radiated fields are expressed by a finite integral and this integral in far-zone can be calculated by a method of steepest descent without performing this integration. Next, we have proposed a new method for analyzing two-dimensional electromagnetic crystals composed of differential material cylinders using lattice sums technique and isolated T-matrices solution. The new approach has improved the computing accuracy than the traditional methods', and then, this method can solve many electromagnetic crystal problems which are difficult for the traditional methods.

这项研究提出了一种分析方法，用于分析由铁氧体材料具有各向异性磁透气性和正常材料或金属组成的电磁晶体。已经研究了许多具有不同结构的电磁晶体。接下来，我们从两个电磁晶体夹杂的线电流源给出了许多辐射结果。辐射模式和增益可以通过提交的偏置-DC磁性控制。接下来，当天线处于电磁晶体中时，该天线上的电流分布受两个晶体的影响。我们提出了一种新的方法，可以从放置在两个二维电磁晶体中的条纹天线中制定辐射。所有电磁场都可以使用绿色函数表示，这些功能是由基于反射矩阵和透射矩阵的光谱域方法得出的。电流的分布可以通过矩方法计算，并且电流可以通过矩方法计算，并且电流也被转换为光谱域中线性相线的无限周期性阵列。辐射场由有限的积分表示，而远区域中的整合物可以通过最陡下降的方法计算而无需执行这种整合。接下来，我们提出了一种新方法，用于分析使用晶格总和技术和分离的T型膜解决方案组成的二维电磁晶体。与传统方法相比，新方法提高了计算精度，然后，这种方法可以解决许多电磁晶体问题，而传统方法对于传统方法很难。