| 摘要 |
PURPOSE: A rotary joint apparatus for an active antenna is provided to efficiently use space inside an active antenna and facilitate connection between other element by making a cable being narrow. CONSTITUTION: An active antenna is fixed on a predetermined portion of a mobile object, such as a ship or a train, etc. A rotating part(10) is disposed on an inside of the active antenna, coupled on an upper end of the first support part of an antenna body, rotated along with the antenna body, and receives a high frequency signal from a coaxial cable. The high frequency signal is amplified through a receiving amplifying part. The first connection pin(31) and the second connection fin(32) receive the high frequency signal from the rotating part(10). The second support part is fixedly formed on the mobile object. A fixing part(40) is coupled with the second support part on a lower end thereof and with the rotating part to be rotated and transfers a signal amplified from the first and second connection pins(31,32) to a control part. The control part is disposed on a predetermined position inside the mobile object.
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