Dual band mobile station

Details Dual band mobile station Dual band mobile station

1997-03-24

1999-10-05

Vo, Nguyen

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

455552, H04B 140

Patent

active

059638524

ABSTRACT:
A dual band mobile station including a main channel synthesizer and an offset synthesizer for generating the transmit frequency and the receive intermediate frequency (IF) required for operation in each of two different bands characterized by different transmit-receive channel offsets. According to the present invention, the main channel synthesizer does not have to change its frequency when the mobile station switches between transmission and reception in either of the two bands so long as a common IF is selected for both bands, which is equal to one or the other of the channel offsets. This IF selection also allows for a reduction in the tuning range of the main channel synthesizer.

REFERENCES:
patent: 4223406 (1980-09-01), Someno
patent: 4419768 (1983-12-01), Yamashita et al.
patent: 4476583 (1984-10-01), Muterspaugh
patent: 5410747 (1995-04-01), Ohmagari et al.
patent: 5465409 (1995-11-01), Borras et al.
patent: 5519885 (1996-05-01), Vaisanen
patent: 5732330 (1998-03-01), Anderson et al.
patent: 5796772 (1998-08-01), Smith et al.

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