Patent ID: 7629862

Claim:
A composite duplexer comprising: a first antenna terminal arranged to be connected with a first antenna; a first receiving terminal arranged to be connected with a first receiving circuit; a second receiving terminal arranged to be connected with a second receiving circuit; a transmitting terminal arranged to be connected with a transmitting circuit; a first switch including, a first branch contact, a second branch contact connected with the transmitting terminal, a third branch contact connected with the second receiving terminal, and a first common contact connected with the first antenna terminal, the first common contact being connected selectively with the first branch contact, the second branch contact, and the third branch contact; a first duplexer connected with the first branch contact of the first switch, the first duplexer including a first receiving filter connected with the first receiving terminal, and a first transmitting filter; and a second switch operable to connect and disconnect electrically between the first transmitting filter of the first duplexer and the transmitting terminal.