高性能隔离分配放大器研制与测量

A High Performance Isolation Distribution Amplifier and its Measurement

文中论述现代精密时频系统对隔离发配放大器的技术要求及其重要作用。介绍为改进守时系统标准频率分配子系统而研制的一个高性能隔能分配放大器。对于5MHz信号,该分配放大器的反向隔离度和路间隔离度均优于115dB(5MHz);相位噪声在1Hz达到-135dBc/Hz;噪声本底为150dBc/Hz;插入秒稳损失达到10^(-13)量级。在13dBm输出情况下,谐波小于-40dBc。对该分配放大器主要性能测试涉及的测量方法也作了介绍。

The importance of the isolation distribution amplifier in many modern precision time and Frequency systems is discussd. A high performance isolation distribution amplifier used to improve our frequency distribution subsystems is presented. The following performances were achieved: Input---output Isolation: 120dB, Channel--- channel Isolation: 115dB, Phase noise(5MHz): -135dBc/Hz(at 1Hz), Noise floor: - 150dBc/Hz, Harmonics: <-40dBc. The relative measurement methods to the distribution amplifier are presented.