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。
The standing wave and the characteristic of the radiated power of this printed antenna fed by the standard coaxial line are analyzed by the numerical method.
文中用数值法分析了这种印制天线在标准同轴线馈电时的驻波和辐射功率特性。
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