Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2009-06-15
2010-10-12
Takaoka, Dean O (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S132000
Reexamination Certificate
active
07812687
ABSTRACT:
A high-frequency switching circuit module includes a high-frequency switch that includes an FET switching element and that selectively connects between a common input/output terminal and one of input/output terminals, and a matching circuit that is provided to the common input/output terminal Pc and is not provided to the input/output terminals. Although a non-selected input/output terminal of the high-frequency switch acts as a capacitor and the impedance between the common input/output terminal and a selected input/output terminal is displaced from a normal impedance, the displacement is corrected by the matching circuit connected to the common input/output terminal such that the impedance viewed from the common input/output terminal Pc to the high-frequency switch is made equal to the normal impedance. Accordingly, a high-frequency switching circuit module having a small overall size and achieving impedance matching for each terminal is provided.
REFERENCES:
patent: 6456172 (2002-09-01), Ishizaki et al.
patent: 7057472 (2006-06-01), Fukamachi et al.
patent: 2004/0087286 (2004-05-01), Inoue et al.
patent: 2004/0266378 (2004-12-01), Fukamachi et al.
patent: 2005/0197095 (2005-09-01), Nakamata et al.
patent: 3029119 (1996-09-01), None
patent: 08-330930 (1996-12-01), None
patent: 10-093302 (1998-04-01), None
patent: 10-093471 (1998-04-01), None
patent: 2001-086025 (2001-03-01), None
patent: 2003-133882 (2003-05-01), None
patent: 2004-187215 (2004-07-01), None
patent: 2005-020140 (2005-01-01), None
patent: 2005020140 (2005-01-01), None
patent: 2005-045345 (2005-02-01), None
patent: 2005-064780 (2005-03-01), None
patent: 2006-157423 (2006-06-01), None
patent: 01/69807 (2001-09-01), None
patent: 2006/057173 (2006-06-01), None
Official Communication issued in International Patent Application No. PCT/JP2007/073303, mailed on Feb. 5, 2008.
Official Communication issued in counterpart Japanese Application No. 2008-550085, mailed on Jun. 23, 2009.
Official Communication issued in corresponding European Patent Application No. 07832923.2, mailed on Jul. 16, 2010.
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Takaoka Dean O
LandOfFree
High-frequency switching circuit module does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-frequency switching circuit module, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-frequency switching circuit module will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4163106