H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/50 (2006.01)
Patent
CA 2127189
Apparatus and Method for Attenuating an Undesired Signal in a Radio Transceiver Abstract of the Disclosure A radio transceiver (100) includes a transmitter (101) and a receiver (103) operating at different respective frequencies. The transmitter (101) is capable of producing an undesired signal (121) including a frequency substantially equal to the receiver operating frequency (107). A first antenna (102) is coupled to the transmitter (101). A second antenna (104) is coupled to the receiver (103) and electrically isolated (122) from the first antenna (102) by a predetermined degree such that the undesired signal (121) received by the second antenna (104) is attenuated by the predetermined degree of electrical isolation (122). An optional filter (112), coupled to an input terminal of an amplifier (113) in the transmitter (101), is adapted to attenuate the undesired signal (121) such that the undesired signal (121) received by the second antenna (104) is further attenuated. An optional directional attenuator (115), coupled between the amplifier (113) and the first antenna (102), is adapted to attenuate an interfering signal (123) received by the first antenna (102) such that the undesired signal (121) received by the second antenna (104) is further attenuated.
Crnkovic James John
Kim Jin Dong
Gowling Lafleur Henderson Llp
Motorola Inc.
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