【摘要】 对满足铁路专用数字移动通信系统(GSM-R)标准的光纤直放站低噪声放大器模块进行了设计、制造和测试。放大器模块由四级放大电路构成,可提供高的增益和线性度。输入级采用双平衡放大结构,不仅能改善放大器级间匹配性,而且由于具有冗余备份功能,可提高模块的可靠性。采用数模混合自动增益控制技术保证低噪声放大器的输出功率稳定和高动态范围。测试结果表明,该模块最大增益达到60dB,增益调节范围大于30dB,互调衰减小于-60dBc,噪声系数小于1.0dB,体现了优异的线性度和噪声性能。该模块完全达到GSM-R高铁直放站的设计要求,目前已通过南京泰通科技的实际应用测试,并开始试应用于铁路系统中。更多还原

【Abstract】 A low noise amplifier module meeting the railway GSM-R standard was designed,fabricated and tested for a GSM-R fiber optic repeater.The module used four stages of amplification to provide the high gain and linearity.The input stage adopted a double balanced structure.It not only improved the stage-stage matching performance,but also increased the reliability for its redundant backup function.The digit-analog hybrid auto-gain control technology was used to guarantee the output power stability and high dynamic range.The measurements results showed that the module achieved the maximum gain of up to 60 dB,the gain adjustment range of greater than 30 dB,the intermodulation attenuation of less than-60 dBc,and the noise figure of less than l.OdB.It exhibited the excellent linearity and noise performance.The module can fully meet the requirements of high-speed railway GSM-R repeaters.更多还原