Communications: radio wave antennas – Antennas – Spiral or helical type
Reexamination Certificate
2007-08-13
2010-12-21
Barnie, Rexford N (Department: 2819)
Communications: radio wave antennas
Antennas
Spiral or helical type
C343S7000MS, C343S767000, C343S770000
Reexamination Certificate
active
07855697
ABSTRACT:
Antenna systems for passive radio-frequency identification (RFID) tags. The antenna systems have a very small form factor with good power harvesting and good performance in proximity to other antennas. The antenna system includes at least one, and preferably two, parallel serpentine antenna elements formed on, or otherwise supported by, an antenna substrate so that a RFID-tag integrated circuit (IC) can be electrically contacted to the antenna system at one end of the antenna substrate. A conducting wire that runs in the same direction as the at least one serpentine antenna element is used to match impedance and enhance antenna performance and power flow between the antenna and the IC. An impedance-matching circuit may be employed in place of the conducting wire to facilitate impedance matching between the antenna and the IC.
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Chamarti Aravind
Downie John David
Sutherland James Scott
Thurow Bradley Richard
Wagner Richard Edward
Adusei-Poku Kwadjo
Barnie Rexford N
Corning Cable Systems LLC
Tran Thienvu V
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