Duplexer with improved transmission/receiving band separation

Details Duplexer with improved transmission/receiving band separation Duplexer with improved transmission/receiving band separation

2005-03-01

2005-03-01

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000, C310S31300R, C455S078000, C455S083000

Reexamination Certificate

active

06861924

ABSTRACT:
In a duplexer for a wireless communication system that comprises a transmission and a reception band, the present invention provides that a split surface wave filter be provided as an input and/or output filter, this split surface wave filter comprising at least two sub-filters that cover neighboring frequency sub-ranges of the corresponding band and supplementing one another to the overall band. At least two pairs of sub-filters are provided that respectively comprise a filter in the input and output filter. Switching between the at least two pairs can be carried out with a switch. Given the same duplexer spacing, a higher band spacing that can be realized with SAW filters is created between transmission and reception band or the corresponding frequency sub-ranges.

REFERENCES:
patent: 4980660 (1990-12-01), Nakamura et al.
patent: 5815804 (1998-09-01), Newell et al.
patent: 5874869 (1999-02-01), Ueda et al.
patent: 5915212 (1999-06-01), Przelomiec et al.
patent: 5963856 (1999-10-01), Kim
patent: 6115592 (2000-09-01), Ueda et al.
patent: 6380823 (2002-04-01), Ikata et al.
patent: 6445262 (2002-09-01), Tanaka et al.
patent: 6472953 (2002-10-01), Sakuragawa et al.
patent: 6483399 (2002-11-01), Atokawa
patent: 6525624 (2003-02-01), Hikita et al.
patent: 0 940 914 (1999-09-01), None
patent: 2 346 049 (2000-07-01), None
patent: 10-290176 (1998-10-01), None

Affiliated with

Also associated with

Rating

Duplexer with improved transmission/receiving band separation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Duplexer with improved transmission/receiving band separation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Duplexer with improved transmission/receiving band separation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3401213