Radio communication device capable of communication in a plurali

Details Radio communication device capable of communication in a plurali Radio communication device capable of communication in a plurali

1995-05-12

1997-06-17

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

Convertible

455 331, 455 89, H04B 140

Patent

active

056406860

ABSTRACT:
A radio communication device which is capable of effecting communications in different communication systems and is highly advantageous economically has a main communication unit capable of effecting communications in a first digital cellular communication system (GSM), and an additional unit to be attached to said main communication unit for effecting communications in a second digital cellular communication system (PCN) which differs from said first digital cellular communication system. The main communication unit includes variable-bandwidth filters compatible with both GSM and PCN. The additional unit comprises a power amplifier, and the main communication unit has a power amplifier. Switching can be made between these power amplifiers to make the radio transmission device compatible with both GSM and PCN. The radio communication device has many components shared by GSM and PCN and hence is highly economical.

REFERENCES:
patent: 5029233 (1991-07-01), Metroka
patent: 5155860 (1992-10-01), McClure
patent: 5175872 (1992-12-01), Borras
patent: 5228074 (1993-07-01), Mizikovsky
patent: 5249302 (1993-09-01), Metroka et al.
patent: 5422931 (1995-06-01), Austin-Lazarus et al.
patent: 5487182 (1996-01-01), Hansson

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