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按平衡—不平衡变换器。
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.
该平衡-不平衡变换功能是利用了无线电接收机与天线之间的一个传输线来实现的，它具有最小的横向尺寸和一个预定的长度。
The balun function is performed by using a transmission line of minimum transverse dimensions and a predetermined length between the receiver and the antenna.
该平衡-不平衡变换功能是利用了无线电接收机与天线之间的一个传输线来实现的，它具有最小的横向尺寸和一个预定的长度。
The balun function is performed by using a transmission line of minimum transverse dimensions and a predetermined length between the receiver and the antenna.
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