Milestone in 6G mobile communications: Stable terahertz transmission over 100 meters

LG, the Fraunhofer Heinrich Hertz Institute HHI and the Fraunhofer Institute for Applied Solid State Physics (IAF) have set up a cellular connection in the frequency range between 155 and 175 GHz over a distance of 100 meters as part of a test setup. The research teams installed prototype technology of the next 6G generation on the roofs of Fraunhofer HHI and the Technical University of Berlin in July 2021.

Those involved put the focus on the stable connection over 100 meters. LG writes in its own message: “Due to the short range of 6G THz and the loss of power during transmission between the antennas and during reception, one of the greatest challenges was the need for power amplification in order to generate a stable signal over ultra-wideband frequencies. That from LG, the Fraunhofer The power amplifier developed by HHI and the Fraunhofer Institute for Applied Solid State Physics (IAF) was critical to the success of this latest test. ”

How fast the data connection was is not stated. In June 2021, research teams in the USA achieved 6.2 Gbit / s, but only over a distance of 15 meters. 6G is penetrating the terahertz range (from 0.1 THz) with 155 GHz and more in order to further increase transmission rates based on 5G.

The structure at one end …

LG further writes: “The power amplifier is able to generate a stable signal power of up to 15 dBm in the frequency range between 155 and 175 GHz. LG was also able to successfully demonstrate the adaptive beam-forming technology (beamforming), which determines the direction of the signal depending on changes in the channel and the receiver position, as well as changing directional antennas, whereby the output signals of several power amplifiers are combined and transmitted to specific antennas. ”

LG is one of the leading companies in the development of the 6G mobile communications standard. Since June 2021, the company has been chairman of the Applications Working Group of the Next G Alliance, which is developing the specification.

The development is currently in the starting blocks: The 6G standard is to be completed by 2025, after which several years will pass before the technology spreads in everyday life. Among other things, the German federal government is funding the Fraunhofer HHI involved here for 6G development.


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