摘要
分析计算了放大器驻波在无隔离直接级联应用时对放大链系统性能的影响。分析表明,在多个放大器无隔离直接级联时,每个放大器相对较小的输入、输出驻波(或反射系数)将使整个放大链系统的输出功率变大或变小,并使带内起伏增大,而且这种变化随着级联级数的增加而加剧。给出了一种降低这种不良影响的极为简单有效的方法。
The effect of each amplifier’s VSWR on the performance of the cascade amplifier system is calculated and analyzed in this paper. The analysis indicates that when some amplifiers are directly cascaded with no isolation, the low VSWR of each amplifier will significantly decrease (or increase) the whole system output power, and increase the fluctuation of output power in frequency band. When the number of cascaded amplifiers is increased, these changes are increased. A simple and effective method to cancel these undesired effects is also given.
