High efficiency broadband antenna
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United States of America Patent
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Jul 23, 2002
Grant Date -
Oct 25, 2001
app pub date -
Apr 11, 2001
filing date -
Feb 17, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An antenna includes at least two planar conductors cooperatingly arranged in a planar configuration having a bifilar spiral winding structure, a log-periodic structure or a sinuous configuration and a frequency-independent reflective backing situated on one axial side of the planar configuration. The backing includes a solid, disk-shaped dielectric substrate having a relatively high dielectric constant, and three mutually perpendicular arrays of elongated dielectric elements at least partially embedded in the solid dielectric substrate. The elongated dielectric elements have a relatively low dielectric constant. The elongated dielectric elements of the three mutually perpendicular arrays are formed as rods, cones and rings.
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