它的物理属性(物理术语称作光谱很窄)意味着即便没有光照射到它上面，它有时也会发射电子，这样就产生了图像噪点。
Its physical properties (its narrow bandgap, in physics parlance) mean that it sometimes releases electrons even though no light has fallen on it, resulting in a noisy image.
低噪放广泛地应用于宇宙通讯、雷达、电子对抗、遥测遥控、射电天文、大地测绘、微波通信等无线电通信系统中。
The Low Noise Amplifier is widely used in Universe Communication, Radars, Electronic Countermeasures, Telemetry and Remote Mapping, Radio Astronomy, Geodetic, Microwave Communications, etc.
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