Feeds

Very tiny RF transistor made from graphene

Sweden’s Chalmers mixes up smaller, faster microwave electronics

The Power of One Infographic

Researchers at Chalmers University in Sweden have demonstrated a graphene-based transistor design that allows more compact RF mixer processing.

Not only would the technology permit more compact RF electronics: reducing the size of electronics also allows circuits to run faster – in the case of the Chalmers G-FET (graphene field-effect transistor), applications could reach up into the terahertz range.

While of limited use in consumer data applications, terahertz systems are important in radar, radio astronomy, and process monitoring, all of which use large arrays of RF mixers.

Graphene’s attraction in such applications is that it is electrically symmetrical, able to act either as an electron carrier or a hole carrier, meaning that a single G-FET is able to act as a mixer without requiring the feeding circuits used in current designs.

The Chalmers G-FET acts as a subharmonic mixer, which helps it meet another challenge of terahertz processing – the lack of oscillators able to drive THz circuits at suitable power. The subharmonic mixer only needs half the local oscillator frequency to operate. ®

Eight steps to building an HP BladeSystem

More from The Register

next story
Malaysian Airlines flight MH17 claimed lives of HIV/AIDS cure scientists
Researchers, advocates, health workers among those on shot-down plane
Forty-five years ago: FOOTPRINTS FOUND ON MOON
NASA won't be back any time soon, sadly
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Mwa-ha-ha-ha! Eccentric billionaire Musk gets his PRIVATE SPACEPORT
In the Lone Star State, perhaps appropriately enough
MARS NEEDS OCEANS to support life - and so do exoplanets
Just being in the Goldilocks zone doesn't mean there'll be anyone to eat the porridge
Diary note: Pluto's close-up is a year from … now!
New Horizons is less than a year from the dwarf planet
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
prev story

Whitepapers

Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.