Patent ID: 7239217

Claim:
An antenna duplexer for transmitting and receiving a plurality of different frequency band signals simultaneously comprising: a diplexer to combine a plurality of different frequency band signals for transmitting and receiving through a terminal connected to an antenna terminal; a first surface acoustic wave filter to transmit and receive low channel frequency band signals through the diplexer; a first phase shift circuit to match a transmission phase with a reception phase of the first surface acoustic wave filter; a second surface acoustic wave filter to transmit and receive high channel frequency band signals through the diplexer; and a second phase shift circuit to match a transmission phase with a reception phase of the second surface acoustic wave filter; wherein the diplexer, the first phase shift circuit and the second phase shift circuit are formed in a package which includes the first surface acoustic wave filter and the second surface acoustic wave filter, wherein the first surface acoustic wave filter and the second surface acoustic wave filter are formed on one chip and are connected to the package using bumps.