Dual-mode communication antenna
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United States of America Patent
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Apr 19, 1994
Grant Date -
N/A
app pub date -
May 13, 1992
filing date -
May 13, 1992
priority date (Note) -
Expired
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Abstract
A compact wide-band panel antenna is modified to provide a dual-mode antenna system with improved operation, particularly in the presence of interfering signals and varying reception conditions in mobile communications applications. A hybrid junction arrangement is used to combine received signals in sum and difference modes suitable for adaptive processing. Signal transmission is provided by reciprocal operation, with a circulator incorporated for signal isolation. The dual mode capability provides previously unavailable performance in a small, economical broad-band antenna.
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