Dual circularly polarized broadband array antenna
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United States of America Patent
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-
Sep 17, 2002
Grant Date -
N/A
app pub date -
May 7, 2001
filing date -
May 7, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dual circularly polarized broadband array antenna includes two arrays of spiral-like antenna elements. The arrays of spiral-like antenna elements are oppositely oriented and located on opposite sides of a substrate member. The spiral-like antenna elements have a loop portion with a free end, and a tail portion. The tail portion of adjacent antenna elements are connected to one another. The antenna elements have feed points, located at the free end, with the feed points of the first array being offset from the feed points of the second array. Each feed point is connected to a balun. The offset of the feed points is adjusted to achieve enhanced isolation between the signals from the two arrays. The antenna can have tuning elements adjacent to the substrate member.
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Cited Art Landscape
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