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超短波接收机的灵敏度灵敏度是超短波接收机主要指标之一.灵敏度又可分为极限灵敏度及实际灵敏度两种.实际灵敏度是指接收机输出端信号与噪声的比为若干倍时,天线中最小电动势值.极限灵敏度是指接收机线性输出端有用信号与内部噪声比为1时,所需输入信号的数值.噪声系数的定义是:
Ultrashort wave receiver sensitivity sensitivity is one of the main indicators of the UHF receiver sensitivity can be divided into two kinds of extreme sensitivity and actual sensitivity of the actual sensitivity is the receiver output signal to noise ratio of several times the minimum antenna emf Value The limit sensitivity is the value of the desired input signal when the receiver’s linear output useful signal to internal noise ratio is 1. The noise figure is defined as: