Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2005-06-14
2005-06-14
Urban, Edward F. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S150100, C455S129000, C455S193300
Reexamination Certificate
active
06907234
ABSTRACT:
An apparatus and method is related to a wireless system with an antenna that is automatically tuned to a desired frequency. The antenna is coupled to an adjustable tuning circuit to form a tuned antenna circuit that has a resonant frequency. The adjustable tuning circuit may be adjusted by activating a sweep generator that varies a tuning element over a broad frequency range. The sweep of the sweep generator is terminated after the proper frequency is found. Alternatively, the adjustable tuning circuit may be adjusted using an array of switched capacitors using a successive approximation method. The tuned antenna circuit may be employed to receive and/or transmit information. The resonant frequency is dynamically shifted in response to a data signal such that the antenna transmits FSK encoded signals.
REFERENCES:
patent: 3571715 (1971-03-01), Beary et al.
patent: 4761796 (1988-08-01), Dunn et al.
patent: 4910511 (1990-03-01), Nagata et al.
patent: 5038405 (1991-08-01), Karr
patent: 5046066 (1991-09-01), Messenger
patent: 5134724 (1992-07-01), Gehring et al.
patent: 5136719 (1992-08-01), Gaskill et al.
patent: 5243356 (1993-09-01), Hama
patent: 5263183 (1993-11-01), Owen
patent: 5301358 (1994-04-01), Gaskill et al.
patent: 5732333 (1998-03-01), Cox et al.
patent: 5742623 (1998-04-01), Nuber et al.
patent: 5757782 (1998-05-01), Gaskill
patent: 5854985 (1998-12-01), Sainton et al.
patent: 5884140 (1999-03-01), Ishizaki et al.
patent: 6081700 (2000-06-01), Salvi et al.
patent: 6212414 (2001-04-01), Alameh et al.
patent: 6236842 (2001-05-01), Kobayashi
Gasgill et al., “High Speed Subcarrier Data System (HSDS),”Seiko Communications, Sep. 21, 1993, 14 pgs.
LTJ Designs, “Sinclair Watch Radio,” last updated Jun. 6, 2000, 2 pgs.
Sinclair, “The FM Wristwatch Radio,” last updated Jan. 7, 1997 1 pg.
Ambient, “Ambient Devices,” Sep. 5, 2002, 3 pgs.
Ambient, “The Ambient Platform,” Sep. 5, 2002, 2 pgs.
Gord John Charles
Karr Lawrence J.
Hertzberg Brett A.
Jackson Blane J.
Microsoft Corporation
Urban Edward F.
LandOfFree
System and method for automatically tuning an antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for automatically tuning an antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for automatically tuning an antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3520777