Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1998-11-06
2001-12-04
Gandhi, Jayprakash N. (Department: 2841)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S814000, C439S946000, C235S492000, C455S090300
Reexamination Certificate
active
06327154
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to wireless modems, especially wireless modems on personal computer cards.
2. State of the Art
Personal computer cards, particulary cards conforming to the Personal Computer Memory Card International Association (PCMCIA) standard have become a mainstay of mobile computing. A variety of devices are available in the PCMCIA format, including memory cards, modems, disk, drives, etc. The development of mobile computing has resulted in an increased demand in particular for wireless modems.
PCMCIA cards come in multiple form factors, including in order of increasing thickness, type I, type II, and type III cards. Because of the significant transmit power requirements of wireless modems, existing PCMCIA-based modems are provided with a rather bulky battery enclosed within an extension to a standard type II card. The antenna of the wireless modem is typically positioned at the end of the battery extension to the PCMCIA card.
It is desired to have an improved battery case for PCMCIA card modem having an antenna.
SUMMARY OF THE PRESENT INVENTION
The inventors have determined that placing the antenna at the end of the battery extension for a PCMCIA card has multiple disadvantages. In particular, an antenna feed-through has to be added to the battery pack to connect the antenna signals to the personal computer card. If the battery is a detachable battery, each time the battery pack is removed from the PCMCIA card, the antenna would have to be removed from the battery pack and attached to the personal computer card. The required connectors for the antenna and/or the antenna feed-through to the battery pack can be quite costly.
The present invention generally relates to a system wherein the antenna is positioned in between the detachable battery pack and the PCMCIA card. Such an arrangement is unusual because the antenna is not positioned at the end of the personal computer card/battery pack unit. The advantage of the system of the present invention is that the battery pack can be attached and detached to the personal computer card without modifying the position of the antenna. Additionally, the detachable battery pack can be connected to the same side of the personal computer card as the antenna. The advantage of this arrangement is that typically the personal computer card is connected to a personal computer or portable device with only a single side exposed to the user. In the present invention, both the antenna and the detachable battery pack can be connected to the single exposed side of the PCMCIA card.
In one embodiment, the detachable battery pack has an extended region for the connector. The antenna on the personal computer card can be positioned over the connector region of the battery pack.
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patent: 5617449 (1997-04-01), Masahiko
patent: 5628055 (1997-05-01), Stein
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patent: 5845217 (1998-12-01), Lindell et al.
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patent: 0862278A2 (1998-09-01), None
patent: 94/09460 (1994-04-01), None
patent: 94/21088 (1994-09-01), None
Gauld Craig S.
McKeen Trent
Vanderhelm Ronald J.
Burns Doane , Swecker, Mathis LLP
Gandhi Jayprakash N.
Sierra Wireless Inc.
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