Duplex radio communication transceiver

Details Duplex radio communication transceiver Duplex radio communication transceiver

1987-01-23

1988-12-20

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

455 86, H04B 156

Patent

active

047929391

ABSTRACT:
In order to reduce the size of a duplex radio communication transceiver such as a mobile telephone, this transceiver is constructed of a transmitting and receiving duplexer, a filter to be coupled to the duplexer, an amplifier for amplifying a signal received, and a filter to be connected with the output of the amplifier. All the filters are made of acoustic surface wave filters, and all the circuits are mounted on a single metallic substrate and sealed by means of a metallic casing into a module. The transceiver thus constructed has a volume which is one tenth as small as that of the device of the same kind according to the prior art.

REFERENCES:
patent: 3728731 (1973-04-01), Choi et al.
patent: 4509165 (1985-04-01), Tamura
patent: 4575698 (1986-03-01), Schofield

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