目的研究余弦形负载超声变幅杆输入阻抗特性。
Aim Study on the characteristics of the input impendence of cosine type loaded ultrasonic horn.
讨论了波导管输入阻抗与负载阻抗之间的关系。
Also, the relationship between the input impedance and load impedance of the waveguide is discussed.
首先推导出波导探针输入阻抗的一般变分表达式。
A general expression of incident impedance of probe in waveguide is deduced first.
实际上高输入阻抗的变压器，它们的效率和频带宽度都会下降。
At high input impedances, in practice both efficiency and bandwidth of a transformer will reduce.
利用本方法对矩形微带贴片的输入阻抗进行了讨论。
The input impedance of a rectangular microstrip patch is discussed by this method.
因为具有很高的输入阻抗，所以级联时不需缓冲级。
It is not in need of buffer stage for cascading because of high input impedance.
一种高输入阻抗、低开关速度及低功耗的半导体器件。
A device which has an extremely high input impedance, low switching speed and low power consumption.
特征：大电流，饱和压降低，输入阻抗低，直流电流增益高。
Features: high current, low saturation voltage, low on resistance, high hFE.
它具有输入阻抗高、电压控制和用低压控制大功率输出的特点。
It is a voltage-controlled device with high input impedance, which makes it possible to control higher output power with a lower input voltage.
第一种方法是测量二极管在各偏压点下的输入阻抗与管壳阻抗。
The first method is based on the measurements of the input impedance at various bias voltages and the cartridge impedance of the diode.
分析表明，三角板天线是一种纯阻性天线，其输入阻抗值比较大。
The analysis shows that the TVA is a pure resistive antenna with a higher input impedance than that of corresponding EVA.
方法①提高整体电路共模输入阻抗以消除皮肤接触阻抗匹配失衡；
Methods High common mode input impedance of the circuit is used to remove the interference due to imbalance electrode impedance.
作为运用实例，分析计算了矩形波导中安装结构驱动点的输入阻抗。
As an example of application, the driving-point impedance of waveguide printed circuit strip mounting structure is analysized and calculated.
本文对运算放大器在差动输入状态下的输入阻抗问题做了全面的分析。
A full-scale analysis of input impedance of the operational amplifier under the state of differential input is given here.
图2 - 7说明分流电容对典型的高输入阻抗电压表输入端的影响。
Figure 2-7 demonstrates the effects of shunt capacitance loading on the input of a typical high impedance voltmeter.
而这类天线可以等效成相参激励下二端口网络来进行输入阻抗的测量。
This type of antenna measurements can be translated into measuring the input impedance of two-port network.
对于输入电路，则按照最大增益的原则使源阻抗与输入阻抗共扼匹配；
The input impedance is matched conjugately to the source impedance according to the maximization gain.
印刷电路板上加绝缘环，消除了线路板绝缘电阻对放大电路输入阻抗的影响。
And insulating ring technology is adopted to further improve input impedance influenced by insulating resistance of printed circuit board.
借助计算机程序，可由微带天线的输入阻抗特性或谐振参数直接求出介电常数。
Based on the measured input impedance characteristics or the resonance parameters of a micro-strip antenna the dielectric constant can be obtained with the help of a computer.
数字式电压表通常有10兆欧的输入阻抗。当测量高阻抗电路时﹐可能会有影响。
DVM usually got an input impedance of 10 Mohm. There may be loading effect when measuring high impedance circuit.
其结果包括阵列单元的输入阻抗、空间波辐射效率、方向性系数和辐射方向图等。
The results for element input impedance, radiation efficiency of space wave, directivity and radiation pattern are presented.
模型的各段经优化后可使模型与人体动脉系统的输入阻抗的幅频值和相频值相符合。
Values of each segment of this model were adjusted to give an optimum match to aortic input impedance both in values of modulus and phase frequencies.
用扫频仪测量天线的输入阻抗时，在同轴传输线与天线间应按平衡—不平衡变换器。
When using frequency sweep meter to measure the input impedance of antenna, the balanced - unbalanced transformer must be connected between coaxial transmission line and antenna.
应用表面阻抗与输入阻抗概念，分别计算实心的转子铁心与非磁性金属槽楔的一相阻抗。
Using the surface impedance and the input impedance respectively, the impedance per phase for the solid rotor steel and the non-ferrous metallic slot wedges is calculated.
通过论证自互补结构天线的输入阻抗基本与频率无关的角度证明了该天线具有超宽带特性。
Showing that frequency is little related to input impedance of the mutual-complementary antenna, antenna of this type is a ultra wide band one.
通过解传输线阻抗转移公式和终端输入阻抗的气隙电容表达式的联立方程得出了数值结果。
The numerical results were obtained in a table by solving the combined equation of transmission line impedance transfer equation and terminal input impedance expression in gas capacitance.
用第一种方法求出了混频器的输入阻抗，用第二种方法讨论了收敛参量对改进收敛性的影响。
We computed the input impedance of mixer with the first method, and we also discussed the effect of the convergent parameter on improving the convergence with the second method.
研究了这种新型套筒天线的输入阻抗、电压驻波比（VSWR）、增益及辐射方向图等电特性。
The electric characteristic parameters of this novel sleeve antenna are calculated, including the input impedance, voltage standing wave ratio (VSWR), horizontal gain and radiation pattern.
本文利用探针上假定电流的自反应，导出了探针式同轴线-矩形波导转换器输入阻抗的表达式。
In this paper, the expressions of the input impedance for a probe type coaxial line-rectangular waveguide transducer are derived by means of self-reaction of an assumed current over the probe.
该转换器的高输入阻抗和低失调电压漂移输入增益级可以保证芯片在微弱电压信号下正常工作。
The designed converter could operate well with a slender supply voltage signal because of its high input resistance and low offset drift.
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