DOCOMO Develops 8-Band Power Amplifier for Mobile Phones

January 8, 2010

NTT DOCOMO announced today that it has developed a prototype multi-band power amplifier that accommodates eight frequency bands between 700 MHz and 2.5 GHz, paving the way for lightweight, all-in-one mobile phones capable of standalone wireless communications of different standards, including the forthcoming extra-fast LTE standard as well as existing W-CDMA and GSM.

Power amplifiers are used in mobile phones to increase signal power up to levels required for wireless communication.

As conventional multi-band phones must employ a separate single-band amplifier for each band, the sizes of these phones will inevitably increase to accommodate new frequency bands for LTE services being launched in markets worldwide, including Japan.

DOCOMO's new amplifier, which offers gain and output power equivalent to those of conventional single-band amplifiers, paves the way for multi-standard mobile phones that are generally no larger than existing models. It enables 8-band operation by employing matching circuits whose frequency characteristics are controlled by multiple switches according to the required frequency band.

DOCOMO will present its new amplifier at the 2010 IEEE Radio and Wireless Symposium in New Orleans, Louisiana, United States, on January 11.

Explore further: Nokia to support GSM technology on 450 MHz frequency band for mobile phones

Related Stories

Conflicting signals can confuse rescue robots

March 2, 2007

Sensor-laden robots capable of vital search and rescue missions at disaster sites are no figment of a science fiction writer's imagination. Prototypes and commercial models of urban search and rescue (US&R) robots will soon ...

Recommended for you

ZTE launches world's first 5G-ready smartphone

February 26, 2017

Chinese telecoms giant ZTE unveiled Sunday what it said is the world's first smartphone compatible with the lightening-fast 5G mobile internet service that networks expect to have up and running by 2020.

Electrical engineers create tiny but powerful medical devices

February 24, 2017

Battery-operated medical devices implanted in human bodies have saved countless lives. A common implant, the cardioverter defibrillator, sends a jolt of electricity to the heart when needed, preventing a heart attack or heart ...

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

fmfbrestel
not rated yet Jan 08, 2010
... and google orders 10 million units

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.