Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Reexamination Certificate
2006-08-30
2009-11-10
Dao, Minh D (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
C370S294000, C333S101000
Reexamination Certificate
active
07616940
ABSTRACT:
A time division duplex (TDD) wireless apparatus includes a low noise amplifier (LNA) system, at least one antenna and a transceiver system. The apparatus supports N time division duplexed channels which each have a transmit direction of transmission flow and a receive direction of transmission flow. The LNA system comprises N sub-units. Each sub-unit comprises a first circulator for connecting to a respective TX/RX feed to the transceiver system and a second circulator for connecting to the at least one antenna. The first circulator and second circulator within each sub-unit are interconnected to provide a path in one of the directions of transmission flow. The first circulator of each sub-unit is connected to the second circulator of another sub-unit to provide a path in the other direction of transmission flow. A single channel variant is also provided.
REFERENCES:
patent: 4641365 (1987-02-01), Montini, Jr.
patent: 4855691 (1989-08-01), Argintaru et al.
patent: 6108313 (2000-08-01), Lee et al.
patent: 6226275 (2001-05-01), Yang et al.
patent: 6591086 (2003-07-01), Pleasant
patent: 6643522 (2003-11-01), Young
patent: 7373115 (2008-05-01), Monroe
patent: 2005/0255810 (2005-11-01), Monroe
patent: 2006/0035601 (2006-02-01), Seo
patent: 2007/0111686 (2007-05-01), Lee
patent: 2009/0033547 (2009-02-01), Kanto
Dolman Graham
Holder Philip
Dao Minh D
Nortel Network Limited
Trop Pruner & Hu P.C.
LandOfFree
Stand-alone low noise amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stand-alone low noise amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stand-alone low noise amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4141435