在毫米波频段,测量阻抗的方法有很多种。虽然测量线和双T波导接头阻抗电桥可以用于阻抗测量,但是由于剩余驻波比(SWR)、探针干扰和耦合等因素所带来的测量误差,从而限制了这些测量装置的使用。为了克服这些限制因素,试图发展两种基本的用于阻抗测量的网络分析仪系统。第一种系统是使用一对平行的,具有下混频器的反射计。当使用低频网络分析仪时,这种系统可以获得阻抗与频率的实时关系图形。这种系 There are many ways to measure impedance in the millimeter wave band. Although the measurement line and dual T-connector impedance bridge can be used for impedance measurements, the use of these measurement devices is limited by measurement errors due to factors such as residual standing wave ratio (SWR), probe interference and coupling. In order to overcome these limitations, attempts have been made to develop two basic network analyzer systems for impedance measurement. The first system uses a pair of parallel reflectometers with downmixers. When using a low-frequency network analyzer, this system provides a real-time graph of impedance vs. frequency. This system