The Control of Crosstalk and Impedance Math-model based on PCB's Ground Track 电路板上地保护走线的阻抗数学模型和串扰控制
Numerical Analysis of Grounding Impedance for Grounding Grids with Multi-Points Short Circuit Current into the Ground 故障电流多点入地接地网接地阻抗数值分析
Impact of a cover layer to high impedance ground plane band-gap 介质覆盖对高阻表面带隙的影响
To broaden the antenna's impedance bandwidth and its radiation pattern, a novel printed dipole antenna with reflecting structure of V-shaped ground plane was proposed. 为了扩展天线的阻抗带宽和改善天线的方向性,提出一种采用了地平面反射结构的新型印制偶极子天线。
Analysis on the input impedance of Ground penetrating radar antennas using complex image method 复镜像法分析探地雷达天线阻抗特性
Then, the variation of characteristic impedance and effective relative permittivity with frequency of defected ground structure are compared with those of microstrip. 而后比较了缺陷地结构和微带线的特性阻抗和有效介电常数随频率变化的规律。
Results of numerical calculation are given, including the soil impedance for rectangular and circular cylindrical inclusion conditions and dynamic response of buried-box structure to harmonic and impulsive loading acting on the ground surface. 文中给出了箱形结构和圆形结构情形的土壤阻抗以及箱形结构在地表简谐压力和三角形脉冲压力作用下的动力反应的数值结果。
Microcomputer Protection System for High Impedance Ground Multiple Fault in AT Feed Traction System AT供电牵引网高阻接地复故障微机保护系统
Transient analysis of impedance of multiple conductor transmission lines above a lossy ground 架空多导体传输线的时域阻抗分析
It further extends the application of node impedance method to solve simultaneous ground fault problems, single phase reclosing problems, transient stability calculations and loss coefficient calculations. 此外,还介绍了将结点阻抗矩阵推广应用于电力系统其他计算问题(异相两点接地、动态稳定、单相重合阐以及线损系数等)中的一些经验。
In order to obtain the impedance matching between transmitter and antennas of ground penetrating radar, the impedance of dipole antennas placing on different ground media is calculated with resistance loaded and unloaded. 为保证探地雷达天线与发射系统的良好匹配,文中采用复镜像法分析了贴地偶极天线阻抗在加载和未加载的情况下,天线阻抗随频率和地下煤质参数的变化特性。
Finally, applying the current basis function of three-term sinusoidal expansion, the radiation characteristic and input impedance of the vertical and horizontal antennas above lossy ground are analyzed by the method of moments with the variation of frequency, height from the ground and ground parameters. 最后,用矩量法,采用正弦插值基函数,研究地面上方垂直、水平线天线的辐射特性和输入阻抗随着频率、离地高度、地面参数等变化的情况。
Influence of composite impedance on measurement of impedance with ground distance relay 复合阻抗对接地距离继电器测量阻抗的影响
The RF self-bias of the substrate in an RF inductively coupled plasma is controlled by changing the impedance of an external circuit inserted between the substrate and the ground. 采用调节射频电感性耦合等离子体中基片电极与地之间的外部电路阻抗的方法,控制基片电极的射频自偏压。
Experimental Studies on Circular Waveguide Dielectric Rod Antenna Using High Impedance Ground Plane 高阻接地面圆波导介质天线实验研究
Generator neutral ground methods include non-ground, low impedance ground, high impedance ground and arc-suppression coil ground. 发电机中性点运行方式有中性点不接地、小阻抗接地、高阻抗接地、消弧线圈接地。
The natural frequency of engineering facilities had better avoid the same with foundation's. In this paper the method using mechanical impedance method to calculate the natural frequency of layered ground is introduced in order to avoid the natural frequency of foundation to realize safety construction. 工程设施的固有频率应尽量避开地基的固有频率,介绍了机械阻抗法求成层地基的固有频率的过程,从而使建筑物可避开该频率,并达到了安全可靠的目的。
In this paper, a simple and effective method to extract characteristic impedance and effective relative permittivity of equivalent even transmission line realized by defected ground structure has been presented. 对缺陷地结构(DGS)实现的等效均匀传输线提出了一种简单有效的由S参数求其特性阻抗和有效相对介电常数的方法。
Moreover, SSN and properties of impedance are analyzed in the cases of power/ ground structure truncated by different boundary conditions. 分析了电源/地板采用不同边界时噪声对系统的影响和电源/地板自身的阻抗特性。
And the case of information fusion based earth faulty feeder detection for indirect grounded system is developed, which has high sensitive and reliability to detect high impedance ground faults. 并以小电流接地系统故障选线为例,提出研究了模糊信息融合故障选线方法技术,提高了故障选线的灵敏度和可靠性。
Starting with the characteristics of double-circuit line when faults happen, integrating with zero sequence network, the paper analyzed the influences to zero sequence component, pilot protection and ground distance protection, especially the influence to measuring impedance of ground distance protection. 本文从同杆并架双回线的故障特点入手,结合零序等值网络,分析了零序互感对零序方向元件、纵联保护、接地距离保护的影响。
In order to establish a robust power delivery network, the input impedance of the power/ ground plane pair is designed to maintain the target impedance and the placement and value of the decoupling capacitors are also discussed. 为建立良好的供电网络,设计了基于目标阻抗法的电源/地平面输入阻抗,并讨论了电容的选取和放置原则。
The basic conception of PBG is formulated. The classification, use and high impedance ground plane of PBG are analyzed, and design principles of impedance ground plane are generalized. 其中重点介绍了PBG的基本概念,分析了PBG的分类、用途和高阻抗表面结构,对高阻抗表面的设计理论做了总结。
The input impedance of the antenna is adjusted by the open tapered slot, which is composed of the top of the M-shaped notch and the T-shaped CPW ground. 利用槽顶端和共面波导地面构成的终端开路渐变槽线实现了对输入阻抗的调节。
Using the resonant analysis and impedance analysis to detect the rationality of the power network, by adding decoupling capacitors to optimize the power network, reduce the voltage overshoot, ground bounce and oscillation phenomenon. 采用谐振分析和阻抗分析来检测电源网络的合理性,并通过添加去耦电容优化电源网络,减小电压的过冲、地弹、振荡等现象。