double-doublet antenna

例句：

1. 1. The double-doublet antenna is used to detect signals from both directions.
   双极天线用于从两个方向探测信号。
2. 2. The new design of the antenna uses a double-doublet structure to improve its performance.
   该天线的新设计采用了双极结构，以提高其性能。
3. 3. The antenna was designed to work with multiple satellites simultaneously, using the double-doublet antenna.
   这种天线被设计用来同时与多个卫星通信，使用双极天线。