Space/angle diversity configurations for cellular antennas
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United States of America Patent
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Feb 16, 1999
Grant Date -
N/A
app pub date -
Feb 4, 1997
filing date -
Feb 4, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Performance of multibeam cellular antenna systems is improved by use of space diversity in antenna placement and angle diversity in antenna alignment. Space/angle diversity is achieved on a single tower structure (20) by placement of eight antennas (B1-B8) in pairs at four spaced locations (I, II, III, IV) at the tower corners. Antennas are placed with an orthogonally directed pair at each location. For each orthogonal pair (e.g., B1 and B2 at location I) there is an antenna located at a different corner which is pointed between the orthogonal directions (e.g., B5 at location II). Antenna placement and alignment for achieving space/angle diversity in triangular tower configurations are also described.
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