HF spherical wave horn

例句：

1. 1.The HF spherical wave horn is used to transmit signals over long distances.
   高频球面波喇叭用于在长距离上传输信号。
2. 2. The HF spherical wave horn was the first device to transmit radio waves over long distances.
   高频球面波喇叭是第一个用于远距离传输无线电波的设备。
3. 3. The HF spherical wave horn is essential for communication in remote areas.
   高频球面波喇叭对于偏远地区的通信至关重要。