Electrically variable beam tilt antenna

Details Electrically variable beam tilt antenna Electrically variable beam tilt antenna

1996-11-13

1999-06-29

Wong, Don

Communications: radio wave antennas

Antennas

Logarithmically periodic

343795, 343853, 333161, H01Q 1110

Patent

active

059174552

ABSTRACT:
An antenna assembly having an operating frequency and a vertical radiation pattern with a main lobe axis defining a downtilt angle with respect to the earth's surface. The antenna assembly comprises a plurality of antennas in first, second, and third antenna groups disposed along a backplane, the backplane having a longitudinal axis along which the antennas are disposed, and a phase adjustment mechanism disposed between the second and third antenna groups, such that adjustment of the phase adjustment mechanism results in variation of the vertical radiation pattern downtilt angle.

REFERENCES:
patent: 3110030 (1963-11-01), Cole, Jr.
patent: 3193831 (1965-07-01), Yang
patent: 4203118 (1980-05-01), Alford
patent: 4788515 (1988-11-01), Wong et al.
patent: 5187455 (1993-02-01), Mandai et al.
patent: 5281974 (1994-01-01), Kuramoto et al.
patent: 5617103 (1997-04-01), Koscica et al.

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