half-wave dipole

例句：

1. 1. The half-wave dipole is a type of antenna that uses the principle of reflection to transmit signals.
   半波偶极子是一种使用反射原理来传输信号的天线类型。
2. 2. In this experiment, we used a half-wave dipole to create an electric field.
   在这个实验中，我们使用了半波偶极子来产生电场。
3. 3. The half-wave dipole has been widely used in communication systems due to its high efficiency and low cost.
   由于其高效率和低成本，半波偶极子在通信系统中得到了广泛应用。