“当你接触到天线上的那个信号衰减点的时候，就改变了天线的阻抗属性，”Banos说。
“When you physically touch the antenna in that spot, you’re changing the impedance characteristics of the antenna, ” said Banos.
“当你接触到天线上的那个信号衰减点的时候，就改变了天线的阻抗属性，”Banos说。
"When you physically touch the antenna in that spot, you're changing the impedance characteristics of the antenna," said Banos.
X1探头﹕没有衰减﹐输入阻抗跟示波器输入阻抗一样(通常是1兆欧)。由于对测试电路有很大的负载影响﹐所以很少使用这种探头。
X1 probe: no attenuation, input impedance follow that of scope input impedance (usually 1 Mohm). This type of probe is seldom used because of heavy loading effect on circuit under test.
文中分析了电力线信道的阻抗、噪声、衰减特性，据此给出了电力线信道模型，有助于深入理解低压电力线通信的特点。
This paper analyzes the impedance, noise and attenuation characteristics of PLC channel and introduces the PLC channel model which will help us understand PLC further.
此外，推导出波导tm、TE模的传输功率、损耗功率、衰减常数、等效阻抗等特征参数的边界元公式。
Furthermore, the formulae of transmitted power, loss power, attenuation constant and equivalent impedance for TM and te modes are deduced.
本文导出线天线的天线调谐器的特性阻抗和衰减特性的计算，并对其进行了分析。
The characteristic impedance and attenuation characteristic calculation of the antenna tuner for wire antennas are derived in this paper. And some analysis methods are given.
这一现象改变了通过导线的电流分布、从而改变导线的阻抗，结果是使信号在高频下衰减。
This phenomenon alters the distribution of the signal current throughout the wire and changes the effective resistance on the wire .
本文将对滤波器与测量仪器之间的阻抗匹配问题加以讨论，提出匹配衰减器的设计方法。
In this paper, impedance matching between LPF and surveying instrument is discussed and the design method is presented.
信号通道由衰减电路、阻抗变换电路、放大电路等电路组成。
Signal channel consists of attenuating circuit, impedance transformation circuit and amplification circuit.
通过使用光耦衰减器的串联和分流相结合可以配置成恒定的输入和输出阻抗，而与控制电压无关。
By using a series and shunt combination of optocouplers the attenuator can be configured to produces a constant input and output impedance, regardless of where the voltage control setting is.
通过使用光耦衰减器的串联和分流相结合可以配置成恒定的输入和输出阻抗，而与控制电压无关。
By using a series and shunt combination of optocouplers the attenuator can be configured to produces a constant input and output impedance, regardless of where the voltage control setting is.
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