High-efficiency GaN power amplifier on Si substrate supports development of mobile communications base stations
June 22, 2012 // Paul Buckley
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.
New class of layered materials drive PV innovations
November 27, 2014
Physicists at the University of Kansas have fabricated a substance from two different atomic sheets of a layer of graphene ...
Lauterbach, Symtavision intermesh software for better safety
Mouser launch design contest around NXP's dual PCB configurable logic
Smart PCBs for smaller ECUs: Infineon invests in PCB manufacturer
FTTH solutions for MDUs
Tiny LED makes bionic contact lenses realistic
November 26, 2014
University of Washington researchers have demonstrated that by using a LED one-third of a millimeter in diameter it was feasible ...
How does a Blu-ray disc improve solar cell performance?
CEO interview: Vicor powers after higher volume applications
Wireless power receiver enables compact and efficient contactless battery charging
- Power Systems Design eBook
- Halogen-free options and increased performance for terminal blocks
- Wireless Power User Guide
- Secure is the New Smart
InterviewCEO interview: Vicor powers after higher volume applications
Patrizio Vinciarelli, is one of the longest serving CEOs in electronics, having founded Vicor in 1981 and led the company ever since. At Electronica he told EE Times Europe that his company is investing ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Cherry is giving away five of its Energy Harvesting Evaluation kits, worth over 266 Euros each, for EETimes Europe's readers to win. Cherry's energy harvesting technology benefit mostly applications where a complex wire assembly and/or batteries would be inappropriate.
The required RF-energy is created by the mechanical actuation of the switch and the data is transmitted...MORE INFO AND LAST MONTH' WINNERS...
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.
Most popular news
- Could magnesium battery innovation end lithium's dominance?
- From warm to cool white: colour-temperature tunable LEDs
- Li-Fi communication module wirelessly transfers data at 1-Gbps
- Rebranding the revolution: the future of IoT is embedded
- Supercapacitor innovation promises panel-powered cars in five years