Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2005-11-01
2005-11-01
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S7000MS, C343S846000
Reexamination Certificate
active
06961022
ABSTRACT:
A radio communications device (100) having an antenna radiator assembly (19) has radio frequency communications circuitry (2), a ground plane (40), a radio frequency radiator element (7) and connectors each physically contacting the radio frequency radiator element (7) at contact points. A feed point (30) formed by one of the connectors couples the radio frequency radiator element (7) to the radio frequency communications circuitry (2). Grounds links (32, 36a, 36b, 36c) formed the connectors selectively couple the radio frequency radiator element (7) to the ground plane (40) via a switching unit (22). When operating in a specific frequency band during a transmit mode, the switching unit (22) selects one the connectors to provide a transmit frequency sub-band, and when operating in the specific frequency band during a receive mode, the switching unit selects another of the connectors to provide a receive frequency sub-band.
REFERENCES:
patent: 5550554 (1996-08-01), Erkocevic
patent: 6255994 (2001-07-01), Saito
patent: 6462714 (2002-10-01), Okabe et al.
patent: 2004/0090372 (2004-05-01), Nallo et al.
Ng Guan Hong
Tan Yu Chee
Tang Kok Kiong
Tay Yew Siow
Le Hoang-anh
Motorola Inc.
Vaas Randall S.
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