Japanese T-ray tech boasts 3Gb/s wireless speeds

Japanese T-ray tech boasts 3Gb/s wireless speeds

The tiny 1mm-square RTD is the heart of the Tokyo Institute of Technology's T-ray system, which is claimed to scale to 100Gb/s.

Japanese researchers have released details of a new wireless networking system which uses a high-frequency band to transmit data at a rate of up to 100Gb/s - a significant boost on the capabilities of current Wi-Fi technologies.

Dubbed 'T-ray,' the new system is named for the terahertz frequency band, although its frequency range actually starts at around 300GHz and rises to 3THz. Many of the frequencies used are borrowed from prototype medical imaging systems - where 'T-ray' systems are being investigated as a safer alternative to traditional 'X-rays' - and boast impressive material penetration capabilities above and beyond the 2.4GHz and 5GHz bands used by Wi-Fi.

It's the information-carrying capabilities of the high-frequency systems that have researchers interested, however. During testing, the researchers were able to tune a T-ray system to 542GHz using a 1mm-square component called a 'resonant tunnelling diode' or RTD. This oscillating device, the smallest ever developed for high-frequency systems, holds the key for getting T-ray technology adopted in smartphones, tablets and other compact gadgets.

Using the 542GHz RTD, the team from the Tokyo Institute of Technology successfully transmitted data at a rate of 3Gb/s - although it is claimed that the system has a maximum theoretical throughput closer to 100Gb/s. Compared to 802.11n Wi-Fi, which tops out at 300Mb/s in current implementations, that's an impressive boost.

T-ray transmissions are short range, but high-bandwidth. As a result, the technology is likely to see significant interest from manufacturers whose products rely on shuffling large amounts of data around as quickly as possible. Smart TVs equipped with a T-ray transceiver, for example, could transmit and receive high-definition content with ease; a digital camera with T-ray capabilities could transmit its images to a laptop or tablet near-instantaneously.

The team's research, published in the Electronic Letters journal, shows that the technology is quite some way away from being ready for commercial implementation. With the RTD proving the key to low-power and compact T-ray components, however, the technology looks a lot closer now than ever before.


Discuss in the forums Reply
B1GBUD 17th May 2012, 10:41 Quote
I predict a Resonance Cascade with those high frequencies!
Gareth Halfacree 17th May 2012, 10:43 Quote
Originally Posted by B1GBUD
I predict a Resonance Cascade with those high frequencies!
"I never thought I'd see a resonance cascade failure, let alone cause one!"
Bazz 17th May 2012, 12:50 Quote
Gordon's ALIVE!
Bede 17th May 2012, 14:04 Quote
Now we just need storage with the ability to read/write at similar speeds.
B1GBUD 17th May 2012, 14:18 Quote
Originally Posted by Bede
Now we just need storage with the ability to read/write at similar speeds.

Close, but not close enough methinks.
Gareth Halfacree 17th May 2012, 14:23 Quote
Originally Posted by Bede
Now we just need storage with the ability to read/write at similar speeds.
That's not a problem: pretty much any mid- to top-end consumer SSD can handle 500MB/s read and write, which is 4Gb/s.
Flibblebot 17th May 2012, 14:47 Quote
One major problem I foresee: bad science.

If wireless is bad for us (my acupuncturist homoeopath told me it was, so it must be true) and that works in the GHz range - so surely something that works in the THz range must be a thousand times worse for us? ;)

How long before the luddites suggest something like that?

On a more serious note, any wireless system that is capable of working through my 2 foot thick walls would be very welcome by me. It's a shame that we're probably at least 5 years away before a viable commercial version is available...:(
blackerthanblack 17th May 2012, 15:51 Quote
The problem with getting workable solutions at this frequency is that it gets much harder to have a reasonable output power, which means short range. One of the other main problems is tuning which involves tailor made parts and lots of testing/retuning to get right (although that's going on my experience of top end R&D equipment so it may be that they've cracked it for lower/consumer parts).
Gradius 18th May 2012, 16:46 Quote
At 1THz and up, your DNA starts to cracking down. No, I'm not kidding at all!
thehippoz 18th May 2012, 17:01 Quote
that's really high freq.. I'd like to see the antennae that delivers- sounds like a gimmick if it has no range
thehippoz 18th May 2012, 18:34 Quote
oh well threw some numbers into a modeler.. you could theoretically get 4x the distance using a small 3 element yagi =] but the f/b ratio is horrible not to mention the pattern, needs a lot of tweaking.. least the numbers put it in the ballpark though

why not just run a cable :D
mauvecloud 19th May 2012, 14:12 Quote
Why are they calling this range T-ray, when it already has a name (Far-infrared)?
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