Closed-Form Expressions of 3-D Via Resistance, Inductance, and Capacitance

Closed-form expressions of the resistance, capacitance, and inductance for interplane 3-D vias are presented in this paper. The closed-form expressions account for the 3-D via length, diameter, dielectric thickness, and spacing to ground. A 3-D numerical simulation is used to extract electromagnetic solutions of the resistance, capacitance, and inductance for comparison with the closed-form expressions, revealing good agreement between simulation and the physical models. The maximum error for the resistance, capacitance, and inductance is less than 8%.      

Determination of the Capacitance, Inductance, and Characteristic Impedance of Rectangular Lines

This paper determines the capacitance, inductance, and characteristic impedance of rectangular lines by the method of conformal transformation. In practical applications, such lines may be used as transmission links of RF energy, as impedance-transforming sections, or as components in electron tubes. Formulas are given for the calculation of the parameters of rectangular lines having the following characteristics: 1) The inner conductor may have varying thickness compared with the depth of the outer conductor. 2) The axes of the conductors may coincide or may be displaced with respect to each other. 3) The edges of the inner conductor may be rounded to lessen the electrical stress occurring at sharp corners. Excellent agreement has been obtained between the calculated results and those found by use of the relaxation method, by direct measurement of models, and by electrolytic tank measurement.     

基于CPLD实现电阻、电感、电容的测量

介绍了基于EDA技术的电阻、电感、电容的测量。本系统以CPLD为控制核心,在MAX PLUSⅡ10.0环境下采用VHDL语言实现了数据采集、转换及显示。该系统具有测量精度高、硬件简单、灵活性强、易于开发等特点。     

先进的阻抗与电容测量转换器

本次在线座谈主要介绍了ADI先进的阻抗与电容测量转换器的原理及应用。本文包括两部分内容：第一部分主要讨论阻抗转换器,第二部分主要讨论电容转换器。在这两部分中,我们先回顾电阻和电容测量方法的主要特点,然后介绍ADI针对这两种应用推出的先进的阻抗数字转换器及电容数字转化器。     

分布电容和分布电感比拟关系的严格推证

比拟法是强电类“电磁场”教学的一个重要内容,本文首先分析某些现行“电磁场”教材利用比拟原理在推导平行平面场中关于分布电容和分布电感参数之间的比拟关系所存在的缺陷,同时详尽地给出了比拟关系的严格推证。该研究工作对本科生和研究生在学习过程中深化理解比拟法,提高理论素养也具有重要的意义。     

射频E类功率放大器并联电容技术研究

为了使E类放大器工作效率最大,需要得到并联电容的确切数值.分析了含线性并联电容E类放大器的和含非线性晶体管寄生输出电容E类放大器的不同特性,给出了不同的设计方法.指出了E类功率放大器设计过程中分析和计算并联电容的难点,阐述了E类功率放大器中并联电容对电路性能的影响,同时给出了考虑并联电容的E类功率放大器的设计方法.     

利用实测数据制定可靠性试验剖面综述

首先,分析了利用可靠性试验标准计算可靠性试验剖面的局限性;然后,介绍了利用实测数据制定可靠性试验剖面的益处;最后,总结了利用实测数据制定可靠性试验剖面的一般过程及常用的数据处理方法,对于今后可靠性试验剖面的制定具有一定的指导意义.     

Capacitance and Inductance Matrices for Multistrip Structures in Multilayered Anisotropic Dielectrics

In this paper we present a unified variational approach to determine the capacitance and inductance matices of generalized multistrip systems embedded in a multilayered iso/anisotropic dielectric lossless medium. The analysis is earned out in the spectral domain to take advantage of previously obtained recurrence relations which calculate the Green's function in the spectral domain. The method leads to a low-order system of linear equations, which is shown explicitly. Examples and comparison with previously published results have been included.     

电阻电容电感测试仪的设计与制作

本电阻电容电感测试仪以AT89S52单片机为控制核心,通过测量频率来间接测量电阻器的阻值、电容器的容量和电感器的电感量,并对测试数据和测试结果进行保存记录,可调出最近十次的测量结果并显示测试的时间、元件类型、参数;所有测量的量程均能自动转换量程,并显示相应的提示语句.     

Approximate Formulas for Line Capacitance and Characteristic Impedance of Microstrip Line

A numerically efficient and accurate method for the derivation of line capacitance and characteristic impedance of a thin microstrip line is discussed. Galerkin's method is found to give highly accurate results when only one or two basis functions are used. We use three methods to derive approximate formulas for microstrip line capacitance and characteristic impedance. Asymptotic lower bounds derived through the variational method and matched asymptotic expansion methods give expressions which reveal the functional forms of these approximate formulas. Seminumerical approximation gives rise to formulas usable on a desk calculator. It is found that there is excellent agreement between the seminumerical formulas, the asymptotic formula derived through matched asymptotic expansions and numerically derived results.     

A Simple and Enriched Closed-Form Formula for Cell Residence Time in 5G Heterogeneous Networks

Wireless Personal Communications - Libraries may become a liability for users security. Existing studies show that libraries can be exploited to propagate malware. Hackers utilize fake or modified...     

A Versatile Active Circuit for Realising Floating Inductance, Capacitance, FDNR and Admittance Converter

An active circuit suitable for realizing floating inductance, capacitance, FDNR and admittance converter depending on the selection of passive elements of the circuit is presented. The proposed circuit employs only two dual output second-generation current conveyors (DO-CCIIs) and does not require passive element matching. The proposed network has a grounded capacitor for the floating inductance and capacitance simulation. Frequency performance of the circuit is tested using SPICE.     

压电分流阻尼系统中压电元件形状与布局优化

根据压电方程和材料力学方程推导出机电耦合情况下压电元件表面电荷计算公式,以此为优化目标,对压电分流阻尼抑振系统中的压电元件形状和位置/布局进行了优化分析。在考虑了压电元件附加质量和附加刚度的影响下,采用ANASYS的APDL语言对四边固支弹性薄铝板进行参数化建模,根据压电元件的模态应变来计算电荷数量。使用拓扑优化方法得到对应于各阶模态的压电元件最优形状,并针对采用单片和多片压电元件的情况,进行了对应于结构各阶振型的布局优化。根据分析结果,提出了压电分流阻尼系统的压电元件形状和位置/布局优化的基本原则。将分析结果应用于一四边固支薄板的振动响应抑制实验,取得了良好的抑振效果,分流电路闭合后第1阶和第5阶模态响应的幅值分别降低了52.9%与62.6%,验证了压电元件形状和位置/布局优化的有效性。     

The Effect of Mutual Inductance and Mutual Capacitance on the Transient Response of Braided-Shield Coaxial Cables

A quantitative comparison is made of the importance of mutual inductance and mutual capacitance in the leakage of transient signals through the braid of a coaxial cable. The difference between mutual inductance and mutual capacitance coupling is vividly exhibited in the transient predictions. Comparisons of predictions to measurements made on a length of RG-214 test cable are also included.     

一种新的基于敏感场变换的电容层析成象算法

本文提出了一种新的基于敏感场变换的电容层析成象（ＥＣＴ）算法,给出了敏感变换的公式和新的确定阈值的公式,计算机模拟的结果表明,经过改进以后的算法对各种相浓度分布的成象结果都有明显的改善,证明该算法较以前有较大进步。     

Erratum to "Approximate Formulas for Line Capacitance and Characteristic Impedance of Microstrip Line"

It has been called to the author's attention that (3) in the above paper appears to be inadequate, especially for scaling.     

Radar Target Recognition Based on Late Time Representation: Closed-Form Expression for Criterion

In the previous paper, we have defined the normalized estimation error and presented the radar target recognition scheme in frequency domain. A time-domain version of the previous paper is considered and a closed-form expression for the defined normalized estimation error in terms of$Z$-plane natural frequencies and transient response is derived. Evaluation of the closed-form expression of the normalized estimation error is shown in the numerical results, where it is shown that the performance of the radar target recognition scheme improves with an increase of the number of the natural frequencies and with an increase of signal-to-noise ratio. Furthermore, the mean and the variance of the square of the numerator of the normalized estimation error are obtained, and the validity of the statistics is shown using the numerical results.     

基于Lodrigues Matrix空间后方交会的三维测量方法研究

相机的标定包括相机的外参数和内参数,通过一定数量的控制点,标定出相机内外参数的过程又称空间后方交会.通过简单易理解的方法推导了共线方程,并引入罗德里格矩阵(Lodrigues Matrix)为旋转阵;通过尼康D70s相机、十字靶标、标尺、摩托车车架以及三点编码标记点为实验条件,以理想相机为前提运用解析法详细解算了相机外...     

基于前项补偿的电容层析成像数据采集系统

电容层析成像系统极板间的电容值相对于耦合电容相差近两个数量级,如何补偿耦合电容成为微小电容测量的难点之一。以12电极油水两相流电容层析成像系统为研究对象,在分析了电容层析成像系统原理的基础上,设计了电容层析成像数据采集系统,系统采用前项补偿方法完成了微小电容的测量,并根据实际测量过程所涉及的关键性问题进行了分析和讨论,通过实验验证了此方法是实用可行的,较好地解决了微小电容精确测量问题。     

基于前项补偿的电容层析成像数据采集系统

电容层析成像系统极板间的电容值相对于耦合电容相差近两个数量级，如何补偿耦合电容成为微小电容测量的难点之一。以12电极油水两相流电容层析成像系统为研究对象，在分析了电容层析成像系统原理的基础上，设计了电容层析成像数据采集系统，系统采用前项补偿方法完成了微小电容的测量，并根据实际测量过程所涉及的关键性问题进行了分析和讨论，通过实验验证了此方法是实用可行的，较好地解决了微小电容精确测量问题。