Polarization diverse antenna for portable communication devices

Details Polarization diverse antenna for portable communication devices Polarization diverse antenna for portable communication devices

1997-02-20

2000-02-29

Le, Hoanganh

Communications: radio wave antennas

Antennas

Slot type

343767, 343702, H01Q 1310, H01Q 124

Patent

active

060315032

ABSTRACT:
A communications card having an antenna assembly providing polarization diversity for use with a portable computer is provided. The antenna assembly comprises two folded antennas, which may be dipoles or slot radiators, that are disposed orthogonally to one another to provide polarization diversity. Signals are carried to and from the antenna by microstrip feed lines. The microstrip lines are placed off center along each antenna slot to establish an acceptable impedance match for the antenna. The feed lines are coupled to the communications card by way of coaxial cables. The antenna assembly is coupled with the communications card in a hinged arrangement thus allowing for spatial redirection of the antenna, if desired.

REFERENCES:
patent: 4438437 (1984-03-01), Burgmyer
patent: 4771291 (1988-09-01), Lo et al.
patent: 4975711 (1990-12-01), Lee
patent: 5486836 (1996-01-01), Kuffner et al.
patent: 5677698 (1997-10-01), Snowdon
IBM Technical Disclosure Bulletin; vol. 37 No. 08, Aug. 1994.

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