传输线小反射信号正交分解和对消技术

Orthogonal Decomposition and Cancellation Technology of Small Reflective Signal on Transmission Line

介绍一种基于信号正交分解和对消原理消除传输线上小反射信号的技术。通过在传输线上引入两个间隔1/8波长的可调不连续性电抗,实现任意相位的小反射信号消除。对该技术的工作原理进行了描述,建立了电路的数学模型并进行了理论分析。分析结果表明,采用适当的电路形式并通过调整电路参数,可对反射信号达到近乎完全的对消,回波损耗可改善40 dB以上。仿真和实验验证了该技术的有效性和理论分析的正确性。

Technology of depressing the small reflective signal of transmission line based on the orthogonal decomposition and cancellation is introduced The operation principle of the technology is described and the mathematical formulas are deduced. Theoretical analysis results show that the reflective signal can be almost completely canceled thus increasing the return loss remarkably （≥40 dB）by using the suitable form of circuit and tuned properly. The effectivity of the technology and the correctness of the theoretical analysis is validated by circuit simulation and experiments.