A radio receiver and directional antenna used as a system to determine the angular direction of incoming radio signals.
无线方向探测器一种无线电接收和指向天线系统，用来确定收到的无线电信号的角方向
No antenna, no radio, we're back in the nineteenth century!
没有天线，没有无线电，我们回到十九世纪了。
Extended the radio antenna.
把收音机的天线拉到最长
