Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2007-06-15
2010-11-02
Wimer, Michael C (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S7000MS, C343S725000
Reexamination Certificate
active
07825868
ABSTRACT:
An antenna assembly that has particular application for a hand held reader that interrogates sensors embedded within a vehicle tire, such as RFID sensors and tire pressure sensors. In one embodiment, the antenna assembly includes a first antenna operating in the 432-435 MHz range that employs a meander-line slot that provides increased antenna cross-polarization so that the sensor can be interrogated regardless of the antenna orientation and polarization. The antenna assembly also includes two RFID antennas that operate in the 902-928 MHz range that are planar antenna that make the antenna bi-directional, polarization free and a wide enough bandwidth for the RFID interrogation.
REFERENCES:
patent: 5872545 (1999-02-01), Rammos
patent: 6091373 (2000-07-01), Raguenet
Katehi Linda P. B.
Munn Jiyoun
Sabet Kazem F.
Sarabandi Kamal
EMAG Technologies, Inc.
Miller John A.
Miller IP Group, PLC
Wimer Michael C
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