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。
VSWR? Voltage Standing Wave Ratio?
电压驻波比?。
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。
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