Antenna array with capacitive coupled upper and lower antenna elements and a peak radiation pattern directed toward the lower antenna element

摘要

An antenna system includes a substrate, a conductive ground plane, and an upper antenna element. 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. The upper antenna element is electrically connected to the ground plane and 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.