Fujitsu receiver could enable smartphones to Wirelessly receive 8K HD video instantly

Fujitsu logoFujitsu Limited and Fujitsu Laboratories have developed a 300 GHz band compact receiver capable of high-speed wireless communications at a rate of several tens of gigabits per second.

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. 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.

As terahertz-band waves attenuate sharply when propagating through space, a highly sensitive receiver is necessary to receive data from weak waves. In recent years, highly sensitive receiver-amplifier chips that work in the terahertz band have been developed by a number of companies, but with the necessity to make the module that mounted the receiver-amplifier chip and the exterior antenna separately, the receivers produced were large and difficult to integrate into mobile devices.

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.

By developing a low-loss technology for connecting terahertz-band antennas with already developed receiver-amplifier chips, Fujitsu has now developed the world's first 300 GHz band receiver with an internal antenna. With a cubic capacity at 0.75 of a centimeter (not including output terminals) it can be installed in mobile devices.

The Japanese company used a polyimide that can be micro-fabricated for the printed-circuit substrate. Signals received by the antenna are transmitted to the receiver-amplifier chip through a connecting circuit. In order to ensure that the terahertz signal is transmitted through the connecting circuit dependably, with low loss, the top and bottom layers of the printed-circuit substrate are grounded, and these layers are connected with electrical lines called through-hole vias. These vias need to be spaced apart by less than one-tenth of the signal's wavelength-in this case, less than a few tens of microns-in order for the radio waves to be transmitted properly. While polyimide as a material has a 10% higher loss than quartz, because its processing accuracy is more than four times higher, the through-hole vias can be placed within several tens of microns of each other, halving the loss as compared to a connecting circuit on a quartz printed circuit.

Fujitsu receiver could enable smartphones to Wirelessly receive 8K HD video instantly

In order to transmit the received signal from the connecting circuit on the printed-circuit substrate to the receiver-amplifier chip with low loss, Fujitsu developed mounting technology that faces the circuit-forming surface of the receiver-amplifier chip toward the printed-circuit substrate. This mounting technology is used for mounting millimeter-wave band collision-avoidance radar chips, but by using it with the polyimide circuit substrate-based low loss transmission technology mentioned above, Fujitsu has successfully expanded the applicable frequencies into the terahertz band for the first time.

The use of this Fujitsu-developed technology will enable small devices to receive 4K or 8K HD video instantly, such as from a download kiosk with a multi-gigabit connection. It will also be possible to expand into such applications as split-second data transfers between mobile devices and split-second backup between mobile devices and servers.

In fiscal 2015, 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.

Source: CDRinfo

Tags: 8K, Fujitsu, technologies

Add comment

Your name:
Sign in with:
Your comment:

Enter code:

E-mail (not required)
E-mail will not be disclosed to the third party

Last news

Pokemon GO had the potential to net $1 billion a year
The report said that Hon Hai has invested about US$600 million in India
Market research firm IDC reports that in the third quarter of this year
Customers will only have to shell out 50% of the cost of their Galaxy S7 device
New flagship will launch in 2017
Patent hints at name of the upcoming Surface AIO
IBM, Globalfoundries and Samsung have chosen to use extreme ultraviolet (EUV) light to pattern transistors
Samsung Galaxy TabPro S - a tablet with the Windows-keyboard
The first Windows-tablet with the 12-inch display Super AMOLED
June 7, 2016 /
Keyboards for iOS
Ten iOS keyboards review
July 18, 2015 /
Samsung E1200 Mobile Phone Review
A cheap phone with a good screen
March 8, 2015 / 4
Creative Sound Blaster Z sound card review
Good sound for those who are not satisfied with the onboard solution
September 25, 2014 / 2
Samsung Galaxy Gear: Smartwatch at High Price
The first smartwatch from Samsung - almost a smartphone with a small body
December 19, 2013 /
HP Slate 7 is a 7-inch Android 4 Tablet PC with good sound
A cost-effective, 7-inch tablet PC from a renowned manufacturer
October 25, 2013 / 4

News Archive



Do you use microSD card with your phone?
or leave your own version in comments