DUAL BAND INTEGRATED POWER AMPLIFIER WITH SWITCHABLE INTERSTAGE MATCH
Original Publication Date: 1997-Jun-01
Included in the Prior Art Database: 2002-May-23
The popularity of cellular communication services has spurred the proliferation of new personal communications systems, resulting in the demand for multi-band and multi-mode telephones. In Europe, the new DCS1800 system is gaining popularity, and will soon share the airwaves with the widely implemented Global System for Mobile communications, GSM. Because of the overlapping coverage of these two systems, a high demand for GSM/DCS1800 dual-band phones is expected. The popularity of DCS1800 is due to its similarities to GSM, however, the two systems operate at different frequency bands with different RF power require- ments. One challenge to realizing the dual-band phone is the implementation of the RF power amplifier. This paper describes an integrated power amplifier (IPA) with a switchable interstage match- ing network which was designed for GSM/DCS 1800 dual-band operation.