8 February 2012

Mitsubishi Electric develops six-band PA in conventionally sized package for automatic band switching and seamless roaming

Tokyo-based Mitsubishi Electric Corp has developed a power amplifier with broadband circuitry that is compatible with six 3GPP-compliant frequency bands between 1.7GHz and 2.0GHz, enabling automatic band switching and seamless international roaming with a single mobile device.

Through using the Quantance qBoost ultra-fast, low-noise, envelope tracking power supply, the unit's power-added efficiency (PAE) rating of 40% is claimed to be one of the highest for a multi-band power amplifier, and its package is among the world's smallest (at 3mm x 3mm x 1mm), which will lead to mobile devices offering longer battery life and reduced size.

Mitsubishi Electric says that its six-band power amplifier addresses several key demands in wireless communication. The increase in wireless traffic due to proliferating smartphones requires mobile devices increasingly to locate and switch to available frequencies when other bands are overloaded. Automatic band switching is also necessary for international roaming. In addition, the use of multiple amplifiers - each dedicated to a certain frequency band - forces mobile devices to devote more space to additional circuitry.

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