Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2006-06-27
2006-06-27
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S846000
Reexamination Certificate
active
07068224
ABSTRACT:
According to an embodiment of the invention, a patch antenna includes a patch coupled to a ground plane. The ground plane includes a first and second strip line. When the first strip line is activated, the antenna generates a signal having a first polarization, and when the second strip line is activated, the antenna generates a second polarization. The first polarization may be a horizontal polarization, and the second polarization may be a vertical polarization. The antenna may be incorporated into a radio frequency identification (RFID) interrogator, which may be used to read RFID tags attached to individual items.
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Carrender Curt
Drzaic Paul S.
Katterhagen Gregory P.
Martin Robert
Price John M.
Alien Technology Corporation
Blakely , Sokoloff, Taylor & Zafman LLP
Nguyen Hoang V.
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