Tokyo Tech, Fujitsu achieve 120 Gbps wireless transmission with new CMOS chip #BelugaSolar
Conventionally, base stations have been connected by optical fiber. One issue with this approach, however, is that it has been difficult to expand service in areas where it is difficult to install a network of optical fiber cables, such as in densely built urban areas or between areas surrounded by rivers or mountains. Demand for connecting base stations wirelessly instead of with optical fiber is increasing for prompt and flexible installation of wireless networks at large-scale stadiums and event venues with transient crowds numbering in the tens of thousands or during disaster recovery. High-capacity wireless transmissions need to use a broad range of frequencies. To facilitate this, use of the millimeter-waveband (30 to 300 GHz) is a suitable option, as few competing wireless applications use it. But because the millimeter-waveband uses such high frequencies, designing...