Filter combiner

Details Filter combiner Filter combiner

2006-05-04

2009-11-24

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S117000, C333S126000

Reexamination Certificate

active

07623005

ABSTRACT:
The invention presents a filter combiner, in particular for mobile communications applications, adapted to be connected to an antenna (12), comprising a first directional coupler (13), connected to at least one first filter (15, 15a,15b), to an antenna branch (12a), to at least one second filter (17, 17a,17b), and to a first signal branch (20), the combiner also comprising a second directional coupler (21), connected to the at least one first filter (15, 15a,15b), to a second signal branch (25), and to the at least one second filter (17, 17a,17b). Further, the first directional coupler (13) is adapted to be connected to the first signal branch (20) via at least one third filter (29, 29a,29b).

REFERENCES:
patent: 5155724 (1992-10-01), Edwards
patent: 5774193 (1998-06-01), Vaughan
patent: 6278498 (2001-08-01), Neff
patent: 6882244 (2005-04-01), Stenberg
patent: 7538634 (2009-05-01), Mallegol
patent: 0520857 (1992-12-01), None
patent: 1217733 (2002-06-01), None
Patent Abstracts of Japan, vol. 200, No. 312, Dec. 5, 2000 & JP 2004056243 A (Nipon Dengyo Kosaku Co Ltd) Feb. 19, 2004 figure 14.

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