Apparatus for using a wireless communication base station in common

A wireless communication base station sharing apparatus for sharing one antenna between a main system and a subsystem, comprising:

• a first magic T connected to a transmission/reception signal line of a main system duplexer through a fourth port, for distributing a signal received through the fourth port and outputting the distributed signals with the same phase to second and third ports, and combining the signal received through the second and third ports according to the phases of the signals and outputting the combined signal through a first port or the fourth port;
• a second magic T connected to a transmission/reception signal line of a subsystem duplexer through a fifth port and connected to the antenna through an eighth port, for distributing a signal received through the fifth port and outputting the distributed signals with the same phase to sixth and seventh ports, and combining signals received through the sixth and seventh ports according to the phases of the signals and outputting the combined signal through the fifth or eight port;
• a first band-pas filter provided in a signal path between the second port of the first magic T and the sixth port of the second magic T, for passing the transmission frequency band of the main system;
• a second band-pass filter provided in the signal path between the third port of the first magic T and the seventh port of the second magic T, for passing the transmission frequency band of the main system;
• a first phase rotator provided in a signal path between the second band-pass filter and the third port of the first magic T;
• a distributor for distributing a signal received from a receiver of the subsystem duplexer;
• a reception filter for filtering a distributed signal received from the distributor;
• and
• a circulator for providing the filtered signal received from the reception filter to the first port of the first magic T.