With GaAs MMICs towards Dual Band Front End Applications in Wireless Communication

Siemens is one of the biggest GaAs RF device manufacturer focusing mainly on mobile communication applications. With the penetration of 3V technologies for handhelds, GaAs devices are becoming mandatory for effiency and noise sensitive applications for RF frontends in mobile communications. While system specific monolithic microwave ICs (MMIC) are becoming standard the integration of different communication systems requires specific dual or even multi mode operations. Keeping a comparable perfomance like single band solutions requires innovative solutions especially for the power amplifier part. We are presenting the first results of a study for the most power and cost effective solutions. Following this concepts even the integration of satellite services like Iridium with terrestrial systems should be possible with one integrated power amplifier device.