Communications: radio wave antennas – Antennas – Body-attached or connected
Reexamination Certificate
2006-07-11
2006-07-11
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
Body-attached or connected
C343S702000, C343S7000MS
Reexamination Certificate
active
07075491
ABSTRACT:
The invention is directed to methods, devices and systems for receiving satellite radio broadcast signals by a portable device with multiple complementary antennas. Portable device, as used herein, indicates a device having a size that may be conveniently carried by a person in the fashion of portable AM/FM radios, CD players, MP3 players, etc. For example, the device may be clipped to an article of clothing. The invention particularly concerns a portable device antenna system for receiving a satellite radio broadcast. In an embodiment of the invention, a portable satellite radio device includes primary and supplemental antennas. The primary antenna covers a substantial portion of the azimuth direction and a vertical elevation within the range of about 20 to 60 degrees of vertical elevation. In one embodiment the primary antenna is a circularly polarized antenna. In use, however, part of the coverage in the azimuth direction will normally be blocked by a body of a person. A supplemental antenna provides coverage that is missing from the primary antenna. The supplemental antenna is packaged to be worn on another area of a person away from the primary antenna. A processor handles selection of signals from the primary and supplemental antennas and provides the signals to a digital satellite radio circuitry.
REFERENCES:
patent: 6720923 (2004-04-01), Hayward et al.
patent: 6980165 (2005-12-01), Yuasa et al.
patent: 2003/0160725 (2003-08-01), Baxter et al.
patent: 2004/0203436 (2004-10-01), Oesterling
Amphenol-T&M Antennas
Greer Burns & Crain Ltd.
Ho Binh Van
Wong Don
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