Electrically variable beam tilt antenna
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United States of America Patent
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Jun 29, 1999
Issued Date -
N/A
app pub date -
Nov 13, 1996
filing date -
Nov 13, 1996
priority date (Note) -
Reissued
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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.
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