Conformal multifunction shared-aperture antenna
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United States of America Patent
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-
Apr 16, 1996
Grant Date -
N/A
app pub date -
Mar 11, 1994
filing date -
Mar 11, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A shared aperture, multifunction conformable antenna has a spiral-mode microstrip (SMM) antenna portion having a spacer for maintaining the SMM antenna in spaced relationship to a ground plane, with dielectric material therebetween. The SMM antenna portion is substantially surrounded by a loop antenna which is spaced therefrom and which is electrically connected to the spiral-mode portion by a high frequency choke to block FM broadcast band signals from the SMM antenna. An AM-broadcast-band-blocking capacitor functions to route AM signals to the SMM antenna portion. The spiral-mode antenna receives signals at frequencies above 300 MHz, the loop antenna receives signals in the FM band, and both the loop antenna and the spiral-mode antenna receive signals in the AM band.
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