Digital mobile transceiver with phase adjusting strip lines conn

Details Digital mobile transceiver with phase adjusting strip lines conn Digital mobile transceiver with phase adjusting strip lines conn

1995-12-18

1997-08-19

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 82, 455129, 455269, 4552761, 370294, 333126, 333132, H04B 146

Patent

active

056598866

ABSTRACT:
In a digital mobile radio apparatus according to the present invention, a duplexer for connecting a transmitter and a receiver to a common receiving/transmitting antenna is constructed from an isolator and a receiving band-pass filter. The receiving band-pass filter prevents a transmitted wave from entering the receiver. Impedance matching is effected so that the isolator can prevent a received wave from entering the transmitter while suppressing the entrance of signals radiated from other mobile units in the same transmitting frequency band but at a different operating frequency.

REFERENCES:
patent: 2507915 (1950-05-01), Lindenblad
patent: 3925729 (1975-12-01), Amoroso
patent: 3931575 (1976-01-01), Amoroso, Jr.
patent: 4186344 (1980-01-01), Higuchi et al.
patent: 4361904 (1982-11-01), Matsumura
patent: 4380822 (1983-04-01), Broton
patent: 4792939 (1988-12-01), Hikita et al.
patent: 5015973 (1991-05-01), Kawakami et al.
patent: 5212815 (1993-05-01), Schumacher
patent: 5276914 (1994-01-01), Ishizuka et al.
patent: 5335360 (1994-08-01), Marko et al.

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