说明：  放大器、混频器和振荡器的常用参数说明，包括增益、变频增益、相位噪声、三阶截取点、P1dB、插入损耗、输出功率、调谐增益和调谐范围
(Amplifier, mixer and oscillator description of the common parameters, including gain, conversion gain, phase noise, third-order intercept point, P1dB, insertion loss, output power, gain and tuning range tuning)