Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-06-06
2006-06-06
Feild, Joseph (Department: 2681)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S562100, C455S078000, C455S552100, C343S702000
Reexamination Certificate
active
07058434
ABSTRACT:
An antenna arrangement for dual mode radio devices such as WCDMA/GSM or Bluetooth radio devices. The arrangement contains two antennas close to each other, where a shorting switch is used at an open end of one antenna to increase isolation by effectively converting the one antenna from a quarter wave length antenna to a half wave length antenna when not needed in order to improve the efficiency of the other antenna. The shorting switch is typically a MEMS switch and the antennas are typically PIFA antennas. A radio device containing the arrangement has also been disclosed.
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Goward Jason
Wang Hanyang
Zheng Ming
Afshar Kamran
Feild Joseph
Harrington & Smith ,LLP
Nokia Corporation
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