6.2 gigabits per second were radioed 15 meters in Canada this week. This was achieved with 6G prototypes that researchers from the University of California in Santa Barbara (UCSB) developed together with Samsung Research. This is announced by the South Korean group. The location of the 6G demonstration was the IEEE conference for communication currently taking place in Montreal.
The digital radio signal in the terahertz range (140 GHz) was emitted by a phased array antenna with 16 channels. The signal was an impressive 2 gigahertz wide. That is 400 times the typical UMTS cellular signal (WCDMA). With 6G, the aim is radio signals that are even an order of magnitude wider. In this high frequency range there is still a lot of free frequency spectrum.
In order to be able to transmit in the terahertz range at all, particularly fast chips are required. Classic transmitters with silicon chips could not emit enough energy at such high frequencies. UCSB has developed special bipolar transistors with several semiconductor materials in order to be able to emit a 140 GHz signal.
It never works without AI
Phased array antennas enable the radio signal to be bundled, shaped and directed in precise directions (beamforming), which will be an essential prerequisite for 6G. The precise calibration of beamforming is so complex that artificial intelligence has to be used: AI algorithms have to calculate the best entry and exit angles for directional beams and guide them in a zigzag around objects and living beings or specifically to reflecting objects. Are at the demonstration in Montreal according to notification Algorithms from the Samsung laboratory were used.
With 6G, Samsung wants to exceed 5G transmission speeds by a factor of around 50. At the same time, the latency times should be reduced by another 90 percent. The South Koreans are hoping for the first commercial 6G systems in 2028 and quantities perhaps as early as 2030. In order to accelerate development, the presidents of South Korea and the United States of America agreed to work together in May.