噪声系数通常用于衡量一个电路和或者系统内部噪声大小，它通常用于比较不同电路或者系统噪声性能的好坏。噪声系数的定义如下： Radio telescopes incorporate LNAs to seize weak electromagnetic signals from celestial bodies. These specialised amplifiers operate with noise temperatures beneath 15 Kelvin to detect cosmic indicators at energy amounts of -one hundred thirty dBm. Impedance matching n... https://andybiynd.ssnblog.com/33251146/the-smart-trick-of-low-noise-amplifier-that-nobody-is-discussing