| 摘要 |
PURPOSE: An apparatus for using a wireless communication base station in common is provided to easily use a feeder cable and an antenna while adding a base station system of different frequency band. CONSTITUTION: A first hybrid coupler(202) distributes a transmission signal of a main system(22) inputted to a first port, and a first filter unit(206) filters reception and transmission signals(Tx1,Rx1) of the main system through the connection to a second port of the first hybrid coupler. A second filter unit(208) filters the transmission and reception signals of the main system through the connection to a third port of the first hybrid coupler, and a second hybrid coupler(204) outputs the combined output signals of the first and second filters units to an eight port. A fifth port of the second hybrid coupler is connected to an additional system.
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