Feeds

German researchers claim 100 Gbps wireless transmission record

Beat that, WiFi! And suck it up, fibre-to-the-premises fans

Maximizing your infrastructure through virtualization

German researchers are claiming a world record, using a 237.5 GHz carrier and photonic mixing to achieve a 100 Gbps wireless link.

Don't throw away that WiFi kit just yet, however: while the reach, at 20 metres, is good enough to cover most household applications, the setup is a little bit exotic at this point in the system's development.

If commercialised, however, the researchers hope their 100 Gbps-capable link could act as a fibre extender in FTTN-style deployments, telling Phys.org “this technology represents an inexpensive and flexible alternative to optical fiber networks, whose extension can often not be justified from an economic point of view”.

The signals were generated using a photonic mixer from NTT Electronics, with custom-made receiver silicon built by the Fraunhofer Institute of Applied Solid State Physics.

Using photonics to generate the carrier wave is important, since it's difficult to work with electrical signals at such high frequencies. The photonic mixer took two light signals generated by lasers, with the difference between them resulting in the modulated 237.5 GHz electrical signal.

That was then fed to a conventional antenna for transmission to the receiver.

As the researchers describe the experiment in their Nature Photonics abstract: “a narrow-band terahertz carrier is photonically generated by mixing comb lines of a mode-locked laser in a uni-travelling-carrier photodiode. The uni-travelling-carrier photodiode output is then radiated over a beam-focusing antenna. The signal is received by a millimetre-wave monolithic integrated circuit comprising novel terahertz mixers and amplifiers.”

Professor Jürg Leuthold explained that the linearity and wide bandwidth of the photonic mixer makes it suitable for “advanced modulation formats with multiple amplitude and phase states”, meaning that it also provides good spectral efficiency.

KIT's fast wireless demonstration

KIT's demonstration setup, showing the receiver connected

to an oscilloscope. Image: KIT

The receiver used HEMT (high electron mobility transistor) technology able to operate between 200 and 280 GHz. Funded by Germany's Federal Ministry of Education and Research, the Millilink project could reach 1 Tbps using multiple transmission paths, according to experiment designer Professor Thomas Zwick from the Karlsruhe Institute of Technology. ®

The Essential Guide to IT Transformation

More from The Register

next story
Yorkshire cops fail to grasp principle behind BT Fon Wi-Fi network
'Prevent people that are passing by to hook up to your network', pleads plod
Major problems beset UK ISP filth filters: But it's OK, nobody uses them
It's almost as though pr0n was actually rather popular
Apple orders huge MOUNTAIN of 80 MILLION 'Air' iPhone 6s
Bigger, harder trouser bulges foretold for fanbois
Google Nest, ARM, Samsung pull out Thread to strangle ZigBee
But there's a flaw in Google's IP-based IoT system
Microsoft unsheathes cheap Android-killer: Behold, the Lumia 530
Say it with us: I'm King of the Landfill-ill-ill-ill
US freemium mobile network eyes up Europe
FreedomPop touts 'free' calls, texts and data
'Two-speed internet' storm turns FCC.gov into zero-speed website
Deadline for comments on net neutrality shake-up extended to Friday
Oh girl, you jus' didn't: Level 3 slaps Verizon in Netflix throttle blowup
Just hook us up to more 10Gbps ports, backbone biz yells in tit-for-tat spat
prev story

Whitepapers

Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
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.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
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.