扫频仪测圆环天线输入阻抗值的可行性研究

摘要

用扫频仪测量天线的输入阻抗时，在同轴传输线与天线间应接平衡—不平衡变换器。针对圆环天线的输入阻抗为复阻抗，提出了一种新的四分之一波长平衡—不平衡变换器，得到了实验结果，并进行了讨论。%When using frequency sweep meter to measure the input impedance of antenna， the balanced－unbalanced transformer must be connected between coaxial transmission line and antenna． As input impedance of circular loop antenna is complex impedance， a new one quarter of wavelength balanced－unbalanced transformer is presented for this measurement， the experiment result are got and some discussions are also given．