H - Electricity – 03 – H
Patent
H - Electricity
03
H
333/57
H03H 9/48 (2006.01) H01P 1/15 (2006.01) H01P 1/205 (2006.01) H01P 1/213 (2006.01) H04B 1/40 (2006.01) H04B 7/04 (2006.01) H05K 9/00 (2006.01)
Patent
CA 2025758
SINGLE-BLOCK FILTER FOR ANTENNA DUPLEXING AND ANTENNA-SWITCHED DIVERSITY Abstract of the Disclosure A single-block ceramic filter (102) is coupled to two antennas (142 and 144) for providing both antenna duplexing and antenna-switched diversity in a duplex radio transceiver (100). One antenna (142) is coupled by the filter (102) to a transmitter (132), and both antennas (142 and 144) are switchably coupled by the filter (102) to a receiver (130) by diversity control circuitry (101) in response to a diversity control signal (137). A microcomputer (134) in the transceiver (100) is coupled to the receiver (130) for monitoring the received signal strength (135). When the received signal strength (135) drops in level indicating that the signal being received on one of the antennas (142 or 144) has become degraded due to fading or other interference, the microcomputer (134) changes the binary state of the diversity control signal (137) for switching the receiver (130) to the other one of the antennas (142 or 144).
Kim Jin Dong
Kommrusch Richard S.
Moutrie Michael F.
Gowling Lafleur Henderson Llp
Motorola Inc.
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