Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2005-08-23
2005-08-23
Dinh, Trinh Vo (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S872000, C343S795000, C343S7000MS
Reexamination Certificate
active
06933896
ABSTRACT:
The present invention is a retractable/extendable diversity antenna that provides the appropriate polarization in a horizontal orientation. The antenna structure is placed within a Type II PCMCIA PC card package and may be extended or retracted with one touch. The antenna structure is large enough to provide for the diversity antenna design and may optionally be housed within a PCMCIA Type II PC Card. At least one spring-loaded mechanism is used to extend the antenna structure beyond the PCMCIA PC Card package and to provide stability while the antenna structure is in the extended position. The diversity antenna configuration may consist of either two miniature, planar antenna modules or two etched printed circuit board contours that are spaced as far apart as possible with a minimum separation of a quarter wave length distance in order to provide mitigation to radio multipath fading effects. The antenna modules have orientations perpendicular to each other such that the polar nulls representative of their radiation patterns remain spatially orthogonal.
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patent: 2001/0043160 (2001-11-01), Hirai et al.
Jones Jeffrey
Madsen Brent
Nguyen Nhan T.
Rios Carlos
Sward Douglas Alan
3Com Corporation
Dinh Trinh Vo
Workman Nydegger
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