Fujitsu has developed the world’s first 300 GHz band compact receiver with an internal antenna. It’s capable of high-speed wireless communications at a rate of several tens of gigabits per second — over 100 times faster than current mobile technology. Radio signals with a frequency greater than 100GHz, called the terahertz band, allow for increases in usable frequency range and communication speed of more than 100 times compared with the 0.8-2.0 GHz range used by current mobile devices. Now, Fujitsu has developed technology that combines a receiver-amplifier chip and terahertz-band antenna with a low-loss connection. This has made it possible to reduce the receiver’s size to one tenth that of previous receivers, making use in mobile devices possible.
One of the main hurdles was that existing high-sensitivity terahertz-band receivers consist of a receiver-amplifier module and separate antenna, with a specialized component called a waveguide to connect them, which makes for large receivers. The most effective way to miniaturize them is to build the antenna directly into the receiver-amplifier module and eliminate the waveguide. Modules with built-in antennas are built by connecting the antenna and the receiver-amplifier chip through an internal printed-circuit substrate, making a waveguide unnecessary. The problem then is that the most common materials for printed-circuit substrates for high-frequency waves are ceramic, quartz, or Teflon, but when used in the terahertz band, there is significant signal attenuation and loss of receiving sensitivity.
Why is this important: Imagine visiting a download kiosk at an event hall, station, bus terminus, shopping mall or theme park and being able to instantly download 4K or HD video straight to your smartphone. Fujitsu envisions “split-second data transfers between mobile devices and split-second backup between mobile devices and servers,” according to Next Big Future.
Fujitsu and Fujitsu Laboratories will begin field trials of multi-gigabit-per-second, high-speed data transfer using this newly developed compact receiver, aiming to commercialize this technology around 2020.
This will dispel the common frustrations felt from ‘on the hoof’ downloads from highly expectant video hungry consumers.
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