Duplexer utilizing a compact splitter circuit

Details Duplexer utilizing a compact splitter circuit Duplexer utilizing a compact splitter circuit

2007-11-20

2007-11-20

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S132000, C333S134000, C333S126000, C333S129000

Reexamination Certificate

active

10785655

ABSTRACT:
The duplexer includes a transmit filter connected between an antenna terminal and a transmit terminal, and a splitter circuit and a receive filter connected in series between the antenna terminal and the receive terminal. The splitter circuit includes at least one phaseline connected between the antenna terminal and the receive filter and at least one resonator connected in parallel with the phaseline. According to the present invention, the length of the phaseline can be made shorter, so the entire duplexer can be made more compact in size. In addition, an inductors are preferably connected between each ends of the phaseline and the resonator. In this case, the inductance of a wire or via formed within the package can be used.

REFERENCES:
patent: 5789845 (1998-08-01), Wadaka et al.
patent: 6201457 (2001-03-01), Hickernell
patent: 6937113 (2005-08-01), Ohashi et al.
patent: 6975180 (2005-12-01), Nakamura et al.
patent: 7-38376 (1995-02-01), None
patent: 2001-024476 (2001-01-01), None
patent: 2004-23655 (2004-01-01), None

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