DOCOMO Develops 8-Band Power Amplifier for Mobile Phones

Jan 08, 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: ARM set to improve battery life for Internet of Things devices

Related Stories

Conflicting signals can confuse rescue robots

Mar 02, 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

Google big Android Wear update adds functions, fun

49 minutes ago

Android Wear's Monday announcement of new features is drawing many compliments from those watching out for what's next in making a smartwatch purchase. The new attractions include the lightness of wearing ...

Data deluge: MLB rolls out Statcast analytics on Tuesday

2 hours ago

Which outfielder sprints the fastest and runs the longest to snag line drives into the gap? Which shortstop is best at throwing from the grass to nip the runner at first? Which catcher gets the ball to second ...

IBM earnings dip as sales fall again

11 hours ago

Technology heavyweight IBM reported Monday lower profits in the first quarter following another drop in revenues, this time partly due to the strong dollar.

User comments : 1

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.