RF duplexer

Details RF duplexer RF duplexer

2007-08-07

2007-08-07

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S189000

Reexamination Certificate

active

10996045

ABSTRACT:
A compact and high-performance RF duplexer and fabrication method thereof, the RF duplexer includes a first filter and a second filter suspended over the substrate connected in series and in parallel and having a plurality of resonators, for passing signals of different frequency bands. A plurality of inductors are connected in series with the parallel resonators of the first and second filters and formed on the substrate. A phase shifter is formed on the substrate for preventing a signal interference between the first and second filters, and a supporter supports the first and second filters and has a plurality of bumps at certain parts on the substrate to electrically connect terminals of the first and second filter with terminals of the substrate. Accordingly, the size of the duplexer is reduced by forming the tuning inductors around the bumps of the PCB.

REFERENCES:
patent: 5561406 (1996-10-01), Ikata et al.
patent: 6262637 (2001-07-01), Bradley et al.
patent: 6919777 (2005-07-01), Taniguchi et al.
patent: 6927649 (2005-08-01), Metzger et al.
patent: 6943645 (2005-09-01), Taniguchi
patent: 6949990 (2005-09-01), Nishihara et al.
patent: 7053730 (2006-05-01), Park et al.
patent: 7053731 (2006-05-01), Iwamoto et al.

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