Antenna array with capacitive coupled upper and lower antenna elements and a peak radiation pattern directed toward the lower antenna element
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United States of America Patent
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Jan 15, 2013
Grant Date -
Nov 17, 2011
app pub date -
May 11, 2010
filing date -
May 11, 2010
priority date (Note) -
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Abstract
An antenna system includes a planar substrate, a conductive ground plane, and an upper antenna element. The conductive ground plane is on the substrate. A slot that is free of conductive material extends through the ground plane to define a lower antenna element from a portion of the ground plane. The upper antenna element is spaced apart and overlies at least a portion of the lower antenna element. A first location of the upper antenna element is electrically connected to the ground plane and a spaced apart second location of the upper antenna element is electrically connected to an antenna feed element. The upper antenna element is configured to electrically resonate responsive to a defined RF signal. The lower antenna element is configured to resonate through capacitive coupling to the resonating upper antenna element.
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