plane concave antenna

例句：

1. 1.The new plane concave antenna is designed to improve communication efficiency.
   新型平面凹面天线的设计旨在提高通信效率。
2. 2.The concave antenna has a unique shape that helps to reduce interference.
   凹面天线具有独特的形状，有助于减少干扰。
3. 3.The antenna was installed in the roof of the building, providing a clear view of the surrounding area.
   天线安装在建筑物的屋顶上，提供了周围区域的清晰视野。