Cellular mobile radiotelephone system using tilted antenna radiation patterns
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United States of America Patent
Stats
-
Feb 3, 1981
Grant Date -
N/A
app pub date -
Mar 8, 1979
filing date -
Mar 8, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In cellular mobile radiotelephone systems employing reuse of a predetermined set of channels in adjacent iterations of a pattern of cells (FIG. 1), average signal-to-interference ratio in at least one cell region of interest is improved by tilting the antenna (11,12) gain pattern center-beam line of an antenna serving that region below the horizontal (FIG. 3). In one embodiment the tilt (.theta.) is sufficient to create a reduced-gain notch (FIG. 8) in the center-beam portion of the pattern.
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Cited Art Landscape
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