Communications: radio wave antennas – Antennas – With means for moving directive antenna for scanning,...
Reexamination Certificate
2007-03-20
2007-03-20
Vo, Tuyet (Department: 2821)
Communications: radio wave antennas
Antennas
With means for moving directive antenna for scanning,...
Reexamination Certificate
active
11065752
ABSTRACT:
An antenna for controlling a beam direction both in azimuth and elevation is disclosed. An antenna comprises a ground plane, at least one active element, and a plurality of passive elements. Both an upper half and a lower half of the passive elements are connected to the ground plane with variable reactive loads, whereby elevation angle of the radio beam is controlled by adjusting the variable reactive loads. Alternatively, an antenna may comprise a radio frequency (RF) choke coupled to the ground plane, whereby an elevation angle of the radio beam is controlled by controlling the RF choke. Alternatively, an antenna comprises a variable lens for changing a wave front of a radio wave which is passing through the variable lens, whereby the beam width and direction are controlled by the variable lens.
REFERENCES:
patent: 4780724 (1988-10-01), Sharma et al.
patent: 6323815 (2001-11-01), Rao et al.
patent: 6369770 (2002-04-01), Gothard et al.
patent: 7034761 (2006-04-01), Chiang et al.
Chiang Bing A.
Goldberg Steven Jeffrey
Lynch Michael James
InterDigital Technology Corporation
Mancuso Huedung
Vo Tuyet
Volpe and Koenig P.C.
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