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 alerts from celestial bodies. These specialized amplifiers function with noise temperatures below 15 Kelvin to detect cosmic signals at ability levels of -one hundred thirty dBm. The relationship of the r... https://pin-diode-switch80256.csublogs.com/41224654/the-2-minute-rule-for-low-noise-amplifier