Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2007-07-30
2010-06-29
Mancuso, Huedung (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S7000MS
Reexamination Certificate
active
07746283
ABSTRACT:
Exemplary embodiments are provided of RFID antenna assemblies having folded patch-antenna structures and that are configured with circular polarization or dual linear polarization. An antenna assembly may generally include two folded patch-antenna structures oriented generally perpendicularly to each other. Each folded patch may create a linear polarization wave. When each folded patch is fed independently, the antenna assembly radiates two independent waves that are perpendicularly polarized to each other, therefore providing a dual polarized antenna. In other embodiments, the antenna assembly may include two folded patch-antenna structures again oriented generally perpendicularly to each other. By feeding each folded patch with a 90-degree phase delay between them, a circular polarization wave is radiated. A power divider network may be used to feed the two folded patches with the 90-degree phase delay. The two folded patches may be integrated so as to form a cavity or housing for a printed circuit board.
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Harness & Dickey & Pierce P.L.C.
Laird Technologies Inc.
Mancuso Huedung
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