Japanese scientists have announced that they have developed a new terahertz (THz) transmitter which can transmit signals at per-channel data rate of 10 Gbps over multiple channels.
The development was a joint effort between Hiroshima University, Panasonic and the Japanese National Institute of Information and Communications Technology. The transmission takes place at about 300 GHz, with the aggregate multi-channel data exceeding over 100 Gbps.
The technology could open doors in wireless communications with up to ten times higher data rates than any existing technology. The researchers claim that the transmitter can cover a frequency ranging from 275 GHz to 305 GHz. The frequency range will be discussed at the World Radiocommunication Conference (WRC) 2019.
Conventional millimeter-wave wireless local area networks typically have frequencies ranging from 57 GHz to 66 GHz. The speed of a wireless link is always proportional to the bandwidth being used and therefore THz is very suitable for ultrahigh-speed communications.
Most of the wireless communication technologies have frequencies of less than or equal to 5 GHz. There are certain high-order digital modulation schemes like the quadrature amplitude modulation (QAM) which enhance data rates within the existing limited bandwidths. The researchers say that QAM is feasible at 300 GHz with CMOS. They further state that THz wireless technologies could offer a significant boost in wireless communication.
Minoru Fujishima, professor at Hiroshima University, stated: “Today, we usually talk about wireless data-rates in Mbit/s or Gbit/s. But I foresee we’ll soon be talking about Tbit/s. That’s what THz wireless technology offers. Such extreme speeds are currently confined in optical fibers. I want to bring fiber-optic speeds out into the air.”
Image courtesy of www.newelectronics.co.uk