查询词典 impedance ratio

Our process capability: Plates: FR4, High TG FR4, high CTI FR4, high frequency materials, halogen-free materials, aluminum and other low-rise Materials :2-20 layer of finished copper thickness :0.5-5 OZ finished thickness: 0.2 -6.0mm Minimum line width: 3mil Minimum line spacing: 3mil smallest shape tolerances:+/-0.1mm minimum finished diameter: 0.1mm maximum thickness aperture ratio: 12:1 wide minimum solder bridge: 4mil characters minimum line width: 5mil Minimum height of characters: 30mil Solder Mask Color: Green, black, blue, white, yellow, purple characters such as color: white, yellow, black and other surface processes: spray tin, lead-free HASL, Electroless gold plating Shuijin, OSP, chemical Shen tin, silver and other chemicals Shen Process: Goldfinger, blue gum, Blind-via/Buried-via, characteristic impedance control, rigid-flexible combination of reliability testing such as: Open / Short testing, impedance testing, solderability testing, thermal shock testing, metallographic analysis of micro-slice curvature Isoptera: 0.7% flame retardant Level: 94V-0

我们公司的制程能力：板材：FR4、高TG FR4、高CTI FR4、高频材料、无卤素材料、铝基材料等层数：2-20层成品铜厚：0.5-5 OZ成品板厚：0.2-6.0mm最小线宽：3mil最小线间距：3mil最小外形公差：+/-0.1mm最小成品孔径：0.1mm最大板厚孔径比：12：1最小阻焊桥宽：4mil最小字符线宽：5mil最小字符高度：30mil阻焊颜色：绿色、黑色、蓝色、白色、黄色、紫色等字符颜色：白色、黄色、黑色等表面工艺：喷锡，无铅喷锡、化学沉金、电镀水金、OSP、化学沉锡、化学沉银等其它工艺：金手指、蓝胶、盲埋孔、特性阻抗控制、刚柔结合等可靠性测试：开/短路测试、阻抗测试、可焊性测试、热冲击测试、金相微切片分析等翅曲度：≤0.7%阻燃等级：94V-0

We can also see that because damping factor is a ratio that requires the load impedance to compute, it must be stated against some known impedance to be meaningful.

我们还可以看到因为阻尼因子是一个比率值，而且需要负载阻抗已知才能够进行计算，所以阻尼因子必须和某一已知的阻抗同时具明才有意义。

Make C as large as convenient to minimize the ratio of the impedance looking from the voltmeter to the impedance of the test circuit.

使C大如方便，以减少比率阻抗从电压表，以阻抗测试电路。

The Smith Impedance Chart is a important tool to analyze reflectance、Standing wave ratio and impedance of Device Under Test. It is also used in vector network analyzer.

Smith阻抗图是分析待测器件反射系数、驻波比和阻抗的重要工具，并且常用于矢量网络分析仪中。

The broadband transmission-line transformer with 4:1 impedance transformation ratio is studied,its equivalent model with mutual coupling between transmission-lines is given,and its impedance transformation characteristics are analyzed.

研究了变换比为4：1的宽频带传输线变压器，给出了考虑线圈互耦的等效电路模型，分析了其阻抗变换特性。

Smith chart was used first, an resonator was designed, whose center frequency and impedance ratio are 930MHz and 0.172 respectly.

设计了一中心频率为930MHz，阻抗比为0.172的介质同轴谐振器，其总长度约等于八分之一波长。

Considering the shortage of voltage sensitivity in small source impedance ratio systems and with high resistance earth fault, the voltage fault component is replaced by memory voltage component to determine the fault's direction.

针对无穷大电源系统中和经高阻接地时存在的电压灵敏度不足的问题，采用保护安装处的记忆电压代替其电压故障分量，从而使保护可以可靠地判别出故障的方向。

Use bifurcation curve and analyze the effect on voltage stability by static load model,propose that critical voltage decrease with the constant impedance ratio increasing.

使用分岔曲线，分析了负荷静态模型对系统电压失稳临界点电压值的影响，得出系统发生电压失稳时临界电压值随负荷模型中恒阻抗负荷比例的增加而降低，并对北京电网进行实例分析。

The transfer function of the LLC resonant converter can be obtained by using the circuit impedance, ratio of resonant inductance, and quality factor.

其后级之半桥LLC谐振式转换器藉由推导电路阻抗、谐振电感比例值与品质因数得到转移函数，以及利用适当的谐振电路的设计与切换频率的调变的方式达到输出电压稳定，并且令功率开关具有零电压切换之功用，以降低功率开关的切换损失。

Through the designed bandpass filter, it can increase the total bandwidth.Moreover, the dual-band bandpass filters are designed by using the impedance ratio of stepped impeedance resonator and meander of transmission Line.

传统上，平行耦合微带线带通滤波器，是两段四分之ㄧ波长传输线等效成一个导纳转器，因为导纳转换器并不具随频率改变的特性，此种仅适合窄频宽时较准确，用在大频宽时，实际的频宽会缩小，经由改善后，可提高频宽。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了