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同轴系统驻波比的扫频测量,目前主要采用扫频反射计测量方法。对于1.1以上的驻波比,这种方法是很有效的。但这种测量技术的精度,受到同轴定向耦合器内部结构的限制,方向性不易做得很高,主线驻波比又较大。因而反向耦合和测试端的失配便成为主要误差因素。反射计系统等效剩余驻波比一般说来都不小,而且随频率的扩展而增高。目前国内生产的同轴扫频反射计的等效剩余驻波比约为1.15左
SWR VSWR measurements, the main method of measurement using swept reflectometer. For the VSWR above 1.1, this method is very effective. However, the accuracy of this measurement technique is limited by the internal structure of the coaxial directional coupler. The directionality is not easy to do and the standing wave ratio of the main line is larger. Therefore, the mismatch between the back-coupling and the test side becomes the main error factor. The equivalent residual standing wave ratio of the reflectometer system is generally not small, and increases with the expansion of the frequency. At present, the equivalent residual standing wave ratio of coaxial swept reflectometer produced in China is about 1.15 left