By equalizing the three - dimension current source to the two - dimension current source in spectral domain , the coaxial probe - fed microstrip antenna is analyzed with the full wave method and moment methods is used to numerically analyze the integral equation 通过在谱域中把空间三维电流源等效成二维平面电流源，对同轴探针馈电的微带天线进行全波分析，运用矩量法对积分方程进行数值分析。
In order to study the quantum effects of an extra dimension , a hamiltonian formulation for a 5d frw cosmology is derived through the direct quantum approach and the full wave function of the 5d universe is separated using a late - time approximation . due to the compactness of the extra dimension , the momentum ps along t he fifth dimension is quantized 为研究紧致额外维的量子特性，我们首先从直接量子化方法给出了五维frw宇宙的哈密顿公式，并用后时近似方法分解了五维宇宙波函数，进而得到因第五维的紧致性而量子化的第5维动量。
Then novel circuit structure of bi - directional voltage mode ( based on forward converter ) inverters with high frequency link , are proposed , which is constituted of input cycloconverter , high frequency transformer , output cycloconverter , input and output filter ; the circuit topologies family of this bi - directional voltage mode inverters with high frequency link include six circuit topologies , such as push pull - full wave mode , push pull - full bridge mode , half bridge - full wave mode , half bridge - full bridge mode , full bridge - full wave mode , and full bridge - full bridge mode etc . taking full bridge - full bridge mode circuit as an example , principle of uni - polarity phase shifting controlled bi - directional voltage mode inverters with high frequency link is introduced 本文首先论述了dc / ac逆变技术的应用前景及发展现状。基于正激forward变换器的双向电压源型高频环节逆变器电路结构,由输入周波变换器、高频变压器、输出周波变换器、以及输入、输出滤波器构成;双向电压源高频环节逆变器电路拓扑族,包括推挽全波式、推挽桥式、半桥全波式、半桥桥式、全桥全波式、全桥桥式六种电路。
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。
This dissertation only considers the signal ’ s distortion by interconnect , such as delay , reflection , discontinuity of microstrip , crosstalk and simultaneous switching noise , and so on . nowadays , there are some simulation software in pcb level , but they are lack of the well ability of modeling . in order to simulate the interconnect accurately , we have to make use of three - dimension full wave analysis method , whose disadvantage is low speed in computing , but is competent for developing rules in high - speed designs 目前也有一些针对这些噪声的高速pcb板级仿真软件,但它们都缺乏详尽的建模能力,特别是当频率逐渐提高和电路板日益复杂后,更是显得无能为力,要精确地对互连结构进行分析,三维全波仿真器似乎不可缺少,其缺点就是速度慢,对整板仿真很难实现,但非常适用于规则开发,而这正好是本文除了建模与仿真方法研究外另一个重点。
The circuit topologies family of voltage mode ac - ac mode ac / ac converters with high frequency link include eight circuit topologies , such as single forward mode , interleaved - forward mode , push pull - full wave mode , push pull - full bridge mode , half bridge - full wave mode , half bridge - full bridge mode , full bridge - full wave mode , and full bridge - full bridge mode etc . the circuit topologies family of current mode ac - ac mode ac / ac converters with high frequency link include single four - quadrant power switch mode , push - pull mode , half - bridge mode , and full - bridge mode circuits . taking full bridge - full bridge mode circuit as an example , principle of uni - polarity phase shifting controll is introduced 电压源交?交型高频环节ac ac变换器电路拓扑族，包括单正激式、并联交错正激式、推挽全波式、推挽桥式、半桥全波式、半桥桥式、全桥全波式、全桥桥式八种电路；电流源交?交型高频环节ac ac变换器电路拓扑族，包括单四象限功率开关式、推挽式、半桥式、全桥式四种电路。
Abstract : the uni - polarity phase - shifted controlled voltage mode ac / ac converters with high frequency ac link based on forward converters are firstly proposed and deeply investigated . this kind of converters is constituted of input cycloconveter , high frequency transformer , output cycloconverter , input and output filters . it includes full bridge - full wave mode and full bridge - full bridge mode topologies , the former is suit for low output voltage field and the later is suit for high output voltage field 这类变换器由输入周波变换器、高频变压器、输出周波变换器、以及输入、输出滤波器构成，包括全桥全波式、全桥桥式两种电路，前者适用于低压输出变换场合，后者适用于高压输出变换场合。
