| 摘要 |
The present invention relates to an Antenna Line Device (ALD) which is installed in each antenna device of a multiple antenna system, and the present invention comprises: a controlling part for controlling according to a control signal received from a base station main unit; and at least two among a DC ping part, an RF ping part and a Domain Detection Part, and the DC ping part includes an electrical element which is installed on a passage for transmitting an operating power so as to cause a voltage drop, and the DC ping part detects the level of the operating power before or after the voltage drop due to the electrical element according to the control of the controlling part, and the RF ping part, for checking the connection state of a feeding line to each antenna array, detects a signal inputted through each feeding line according to the control of the controlling part, and the Domain Detection Part includes a switch for opening and closing so as to perform an identifying operation of an antenna device which is installed on a passage for transmitting control information and which covers each sector. |
