Wireless Technology from Japan Aims to Deliver Fiber Optic Transmission to the Future

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Wireless Technology from
Japan Aims to Deliver
Fiber Optic Transmission
to the Future
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At the conference held in San Francisco, California, professors from Hiroshima University,
together with engineers from the National Institute of Information and Communications
Technology, and Pa nasonic Corporation, unveiled plans to create a wireless transmitter for
the future. Built as a silicon CMOS circuit, the transmitter would be capable of per-channel
signal transmission over multiple 300 GHz channels.
The days of the gigahertz band may be numbered.
During the International Solid-State Circuit
Conference (ISSCC) 2016, engineers from Japan
announced the development of a terahertz (THz)
transmitter that can outperform current models
tenfold. The module could transmit over ten
gigabits per second over multiple channelsa big
leap forward from today’s <5 GHz technology.
A single transmitter could deliver to one of its channels the same amount
of data 60 current wireless transmitters would. These rely on high-order
digital modulation schemes, like the quadrature amplitude modulation
(QAM) to enhance data rates. The THz transmitter proves that QAM is
applicable to 300 GHz CMOS technology, and that it can be used
commercial and even consumer settings.
"Today, we usually talk about wireless data-rates in megabits per second or gigabits per
second. But I foresee we'll soon be talking about terabits per second. That's what THz
wireless technology offers. Such extreme speeds are currently confined in optical fibers.
I want to bring fiber-optic spee ds out into the air, and we have taken an important step
toward that goal," Fujishima said. The team is currently working to develop 300-GHz
wireless circuits for use with the new transmitters.
The Transmitter of the Future
Prof. Minoru Fujishima of the Hiroshima University Graduate School of Advanced Sciences of
Matter cited that the team achieved such unprecedented speeds by using a mix of current and
new technology. “Now THz wireless technology is armed with very wide bandwidths and QAM-
capability. The use of QAM was a key to achieving 100 gigabits per second at 300 GHz," he
said.