beam antenna system
[电] 指向天线系
fanned-beam antenna
[电] 扇射束天线
helical-beam antenna
[电] 螺形射束天线
pencil-beam antenna
[电] 笔形波束天线
rotary-beam antenna
[电] 旋转射束天线
shaped-beam antenna
[电] 型束天线
