Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2011-01-25
2011-01-25
La, Anh V (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572400, C340S010420, C340S539110
Reexamination Certificate
active
07876227
ABSTRACT:
A handheld radio frequency identification (RFID) reader includes a polarization insensitive antenna that enables simultaneous operation in two orthogonal polarization modes. The RFID reader includes an RF communication module and an antenna coupled to the RF communication module. The RF communication module is configured to process RF signals associated with operation of the RFID reader, and the antenna is configured to transmit and receive RF energy associated with operation of the RFID reader. The antenna includes a conductive loop element having a major longitudinal path, and a slot formed in the conductive loop element along the major longitudinal path. The conductive loop element is configured to operate as a first antenna polarized in a first orientation, and the slot is configured to operate as a second antenna polarized in a second orientation.
REFERENCES:
patent: 7298251 (2007-11-01), Meyers et al.
patent: 7427955 (2008-09-01), Choi et al.
patent: 2008/0129641 (2008-06-01), Lee et al.
patent: 2008/0174432 (2008-07-01), Ulrich
La Anh V
Symbol Technologies Inc.
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