A microstrip array is designed to meet the needs of the technical specifications . a hybrid method with the full wave , fft and biconjugate gradient ( bcg ) is used to calculate the current distributions on the microstrip . the simulated results show that the method can improve the analysis efficiency and speed up the calculation speed 研制了符合技术指标的微带天线阵列,设计中将传统的全波分析方法与快速付立叶变换( fft )和双共轭梯度( bcg )法结合起来,用于分析微带天线的电流分布,改进了计算方法,加快了计算速度。
Firstly , this paper analyzes the tcl company background as well as its fridge markets , and draws a conclusion that tcl fridges belong to “ the second line ” brand , which increases the immaterial negotiation and passage cost ; through analyzing the fridge current distribution condition , concludes that the home electronic appliance chain sale is the leading distribution channel in the 1 ~ ( st ) and 2 ~ ( nd ) grade markets ; through the analysis of the distribution mode , finds that the mode of a tcl office leads to cost rising . the distribution channel theory is adopted during the whole analysis 首先、分析tcl公司背景、冰箱产品市场,得出tcl冰箱属于二线品牌,进入大卖场就无形地增加了谈判成本、通路费用等;通过对冰箱分销渠道现状的分析,得出在一二级市场冰箱的主要分销渠道是家电连锁;分析冰箱分销渠道模式,得出tcl的分公司?办事处模式导致渠道成本增加。在分析的过程中运用了分销渠道理论。
Then the solving procedures of these bies by the rwg functions based moment method are elaborated , and the method of modeling complex objects built of arbitrary line , surface and volume structures is developed . in order to solve realize antenna and circuit problems , methods of adding excitations and concentrated loadings with moment method are deceloped , and matrix pencil ( mp ) method is used to deembeded the s prameters of antennas and circuits from the computed current distribution . some numerical results of practical complex antenna and scattering problems are presented to illustrate the veracity and effectiveness of the method 在第一部分中,首先从电磁场的基本理论出发,基于等效原理和边界条件以统一的方法建立了用于分析金属、介质及金属与介质混合结构的边界积分方程,并归纳和比较了各类积分的适用范围和优缺点;在此基础上,给出了使用基于rwg函数的矩量法求解各种边界积分方程的一般过程;研究了具有任意线、面、体组成的复杂结构的电磁建模方法,并给出了各种多面连接情况下基函数和未知量的选取方法;研究了使用矩量法分析电路、天线问题时集总元件和激励源的处理方法,并基于矩阵束方法( matrixpencilmethod )提取了电路和天线问题的s参数;最后通过分析一些工程中的复杂金属天线问题和具有“金属与介质混合结构”的散射和天线问题验证了方法的准确性和高效性。
The strict solution of the eddy current distribution inside a conductor cylindrical boundary surface for quasi - state - state is obtained by derivation of maxwell ’ s equations ; meanwhile , the approximate solution of the eddy current and electromagnetic field in the condition of the low - frequency or the high - frequency are obtained . furthermore the penetration depth of the skin effect is achieved 五、讨论了似稳条件下导体圆柱面内的涡电流分布的规律。我们采用圆柱界面条件下获得的趋肤效应的穿透深度与采用平面条件下获得的趋肤效应的穿透深度相一致,我们的研究可视为对传统教材相关论述的有益补充。