Multi-antenna handheld wireless communication device

Details Multi-antenna handheld wireless communication device Multi-antenna handheld wireless communication device

2006-09-05

2006-09-05

Wimer, Michael C. (Department: 2828)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S727000, C343S846000

Reexamination Certificate

active

07102577

ABSTRACT:
Antenna systems for handheld wireless communication devices (100) that comprise a first unbalanced feed antenna (112, 718, 802, 1204, 1812) and a second balanced feed antenna dipole antenna (202, 716, 804, 1202, 1802) that are located next to a ground structure (116, 810, 1210, 1824) for the handheld wireless communication devices are provided. The balanced feed dipole antenna and the unbalanced feed antenna exhibit disparate spatial-polarization patterns which are suitable for use with a MIMO transceiver, and the decorrelation of signals received by the two antennas is preserved due to a low level of coupling through the ground structure, which is due, in part, to differences in the symmetry properties of current patterns in the ground structure that are associated with the operation of the two antennas. The two antennas can also be used in a transceiver (629) that uses separate antennas to receive and transmit.

REFERENCES:
patent: 6426723 (2002-07-01), Smith et al.
patent: 6731920 (2004-05-01), Iwai et al.
patent: 2252453 (1992-08-01), None

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