Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2008-06-23
2011-12-06
Cumming, William D (Department: 2617)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C370S297000, C343S702000, C343S753000, C324S639000, C438S029000
Reexamination Certificate
active
08073514
ABSTRACT:
A dual autodiplexing antenna (300) redirects power flow (303) from an unloaded antenna to a loaded antenna, thereby improving communication performance under loaded conditions. The dual autodiplexing antenna (300) includes a first antenna (101) disposed at a first end (103) of a portable two-way communication device (100). A second antenna (102) is disposed at the distal end (104) of the portable two-way communication device (100). The first antenna (101) and second antenna (102) are coupled to a transceiver (107) by a first transmission line matching circuit (201) and a second transmission line matching circuit (202), respectively. In one embodiment, the first antenna (101) is configured to primarily operate in a first bandwidth, while the second antenna (102) is configured to primarily operate in a second bandwidth. When one of the first antenna (101) or second antenna (102) is loaded, power flow (303) is redirected to the lesser loaded antenna.
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Asrani Vijay L.
Black Greg R.
Napoles Adrian
Cumming William D
Motorola Mobility, Inc.
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