A heterojunction bipolar transistor (HBT) MMIC linear power amplifier is demonstrated for the 1.9 GHz Japanese Personal Handy Phone utilizing the π/4 DQPSK modulation technique. At an operating voltage of only 3 V, an output power of 21 dBm and a power added efficiency of 35% are obtained along with a modulation vector error of 4.5% and an adjacent channel interference of -60 dBc in +/—600 kHz offset frequency bands.
|Number of pages||3|
|Journal||IEEE Microwave and Guided Wave Letters|
|Publication status||Published - 1994 Mar|
ASJC Scopus subject areas
- Physics and Astronomy(all)