Print  |  Send  |   

High-efficiency GaN power amplifier on Si substrate supports development of mobile communications base stations

June 22, 2012 // Paul Buckley

High-efficiency GaN power amplifier on Si substrate supports development of mobile communications base stations

Mitsubishi Electric Corporation has developed a prototype high-output, high-efficiency 2 GHz power amplifier for mobile communications base stations.


The amplifier, which features a gallium nitride (GaN) transistor on a silicon (Si) substrate instead of a more costly silicon carbide (SiC), achieves a conversion efficiency rating of 70%, unprecedented among 2 GHz power amplifiers with outputs of 150 W or higher.

The amplifier will help the development of smaller and more power-efficient base station transmitters. The installation of such equipment in tighter spaces will help expand wireless network coverage to accommodate increasing wireless traffic due to smartphone proliferation.

While amplifiers that use GaN transistors consume less power and have a higher output than amplifiers made with silicon transistors, they typically require a more robust substrate made of silicon carbide, which elevates the cost. Initial efforts to develop a GaN transistor using a Si substrate were hampered by deformation between the GaN layer and Si substrate, which led to increased loss and decreased power conversion efficiency. Eventually, however, the company designed a high-performance transistor by optimizing the GaN crystal structure and inserting a buffer layer between the GaN layer and Si substrate.

Mitsubishi Electric’s new GaN power amplifier made with affordable silicon substrate achieves a power conversion efficiency of 70% at 2.1 GHz, largely improving upon the 58% conversion efficiency of Si transistor amplifiers currently available commercially.

Visit Mitsubishi Electric at www.MitsubishiElectric.com

All news

Power components

Follow us

Fast, Accurate & Relevant for Design Engineers only!

Technical papers     

Linear video channel

READER OFFER

Read more

This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.

Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...

MORE INFO AND LAST MONTH' WINNERS...

Design centers     

Automotive
Infotainment Making HDTV in the car reliable and secure

December 15, 2011 | Texas instruments | 222901974

Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.

 

You must be logged in to view this page

Login here :