directional antenna

英文造句：

1. A radio receiver and directional antenna used as a system to determine the angular direction of incoming radio signals.
   無線方向探測器一種無線電接收和指向天線系統，用來確定收到的無線電信號的角方向

英文解釋：

名詞 directional antenna:

1. an antenna that transmits or receives signals only in a narrow angle