Single and dual-band patch/helix antenna arrays
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United States of America Patent
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Apr 13, 2004
Grant Date -
Jan 15, 2004
app pub date -
Jul 12, 2002
filing date -
Jul 12, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Single and dual frequency band spatial null steering antenna arrays are disclosed, comprised of primary resonant quadrifilar helix antennas and auxiliary resonant patch antennas, which comprise stacked patches in the dual-band embodiments. Several feed networks are described for producing, preferably, circularly polarized radiation in satellite frequency bands (e.g., L1 and L2) with pattern nulls steerable to desired elevation angles. Various top and bottom-fed quadrifilar helix antennas configurations are also described.
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