Shortened wideband decoupled sleeve dipole antenna
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United States of America Patent
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-
Mar 8, 1988
Grant Date -
N/A
app pub date -
Jul 1, 1985
filing date -
Jul 1, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shortened wideband decoupled sleeve dipole antenna is disclosed in which a helically wound upper radiating element and an inductively loaded lower radiating sleeve element reduce the linear size of the antenna. Substantial decoupling is provided by a helically wound feed coaxial transmission line within the sleeve element. A matching network at the antenna feed point provides capacitive reactance above the antenna resonant frequency and inductive reactance below the antenna resonant frequency such that an impedance match between the feed coaxial transmission line is obtained at frequencies above and below the resonant frequency and dual-band performance may be obtained.
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