Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1997-04-30
2000-02-01
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
455101, H04B 144
Patent
active
060213175
ABSTRACT:
Dual antenna radiotelephones which include antenna-management switching means that allow the radiotelephones to assume a plurality of different static and dynamic configurations, either adaptively or in response to user commands. These switching means may also provide a means for connecting the radiotelephone to one or more external antennas, and may facilitate use of diversity reception and or transmission techniques. In one embodiment of the present invention, the radiotelephone includes a transmitter, first and second receivers, a user interface, first and second antennas, and antenna switching means. These antenna switching means selectively couple the transmitter, the first receiver and the second receiver to the first and second antennas. The antenna switching means may be implemented as a matrix switch that selectively electrically connects (i) the transmitter to the first antenna, (ii) the transmitter to the second antenna, (iii) the first receiver to the first antenna and (iv) the second receiver to the second antenna.
REFERENCES:
patent: 5353334 (1994-10-01), O'Sullivan
patent: 5463406 (1995-10-01), Vannatta et al.
patent: 5613219 (1997-03-01), Vogel et al.
patent: 5724666 (1998-03-01), Dent
patent: 5809405 (1998-09-01), Yamaura
U.S. Patent application, Serial No. 08/586,433 filed Jan. 16, 1996.
Eisenzopf Reinhard J.
Ericsson Inc.
Fuller Greta J.
LandOfFree
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