VSWR? Voltage Standing Wave Ratio?

电压驻波比?。

This paper introduces a kind of measuring method of standing wave ratio on-line.

驻波比是衡量雷达发射机和天馈系统工作状态的一项重要指标。

The antenna and cable must be carefully matched to ensure a low Standing Wave Ratio (SWR).

小心地将天线与电缆匹配，以确保低定波比率（SWR）。

The Finite Difference Time Domain(FDTD) method was used to calculate the Voltage Standing Wave Ratio(VSWR) of a quasi-Yagi antenna.

介绍时域有限差分（FDTD）法计算准八木天线驻波比的算法实现方法。

Therefore, the author try to utilize standing wave ratio of the microwave transmission line theory to measure plant water content in this paper.

为此，本文首次提出尝试利用微波传输线理论中的驻波原理测量乔木茎干含水率。

Due to semiconductor process we must trade off between input voltage standing wave ratio (VSWR) and Noise Figure. In this paper, a balanced LNA is adopted.

由于半导体工艺制程的关系，一般来说低噪声放大器噪声匹配和输入端驻波比匹配是矛盾的。

By comparative analysis, the dependence of the resonant frequency, voltage standing wave ratio, bandwidth and input resistance on different geometric parameters is obtained.

通过比较分析，得到了天线谐振频率、谐振点电压驻波比、带宽以及输入阻抗随不同几何参数的变化规律。

The utility model has the characteristics of light weight, small dielectric gain loss, low dielectric thermal noise temperature, small input voltage standing wave ratio, etc.

本实用新型具有重量轻、介质增益损失小，介质热噪声温度低、输入电压驻波比小等特点。

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.

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 standing-wave ratio in line all is smaller than 1.08, for 2<40.

数值计算结果表明，用修正公式设计的阻抗匹配器，在2<40范围内，驻波比全都小于1.08。