Patent ID: 8305941

Claim:
A system for combining a plurality of signals in a wireless communication device, said system comprising: a plurality of base station duplexers each coupled to a corresponding base station from a plurality of collocated base stations each base station capable of simultaneously receiving and transmitting signals in accordance with a corresponding transmission protocol; wherein each duplexer includes transmit and receive paths for allowing signals to be transmitted from the base station and further allowing signals to be received by the base station in accordance with different protocols; isolators, including ferrite broad band isolators, exhibiting at least a 20 dB isolation, each coupled to a corresponding one of said transmit path of each of said duplexers; bandpass filters, each coupled to an output port of a corresponding one of said isolator, and each exhibiting high impedance, with substantially an open circuit characteristic, at rejection frequencies, configured to tune with a center frequency and a band pass range that is substantially equal to the center frequency and bandwidth of the transmitted signal; a combiner for receiving signals provided by each one of said band pass filters; and an antenna duplexer coupled to an output port of said combiner via a transmit path, said duplexer providing a combined signal of said collocated base stations to an antenna, said duplexer further including a receive path for providing signals received by said antenna to a corresponding receive path of each of said base station duplexers.