radar antenna characteristic

例句：

1. 1.The radar antenna is designed to detect objects in the air.
   雷达天线被设计用来探测空中物体。
2. 2. Radar antennas are used for tracking and communication purposes.
   雷达天线用于跟踪和通信目的。
3. 3. The radar antenna's performance was tested on various weather conditions.
   雷达天线的性能在各种天气条件下进行了测试。