Tokyo Institute of Technology and Fujitsu Laboratories have developed a CMOS wireless transceiver chip that can process signals at high speeds with little loss across a broad range of frequencies, from 72 to 100 gigahertz (GHz). The researchers report record wireless speeds of 56 Gbps over a distance of 10cm.
Some highlights:
- The high-speed wireless transceiver technologies use the millimeter-waveband (30-300 GHz), where there are few competing wireless applications, and which are capable of large-capacity communications.
- Tokyo Institute of Technology developed a technology for broadband, low-loss transceiver circuits in which data signals are split in two, with each converted to different frequency ranges, and then recombined (Figure 2). Each signal is modulated into a band 10-GHz wide, with the low-band occupying the 72-82 GHz range, and the high-band occupying the 89-99 GHz range.
- The technology enables modulation on an ultra-wideband signal of 20 GHz, with low noise and a similar range in the ratio between input and output power as existing 10 GHz band methods, which results in high-quality signal transmissions.
- Fujitsu Laboratories and Tokyo Institute of Technology developed an interface between the circuit board and waveguide that uses a specially designed pattern of interconnects on the printed circuit board to adjust the impedance for the ultra-wideband range, enabling loss in the desired frequency range to be greatly reduced.
http://www.fujitsu.com/global/about/resources/news/press-releases/2016/0201-02.html