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posted by Fnord666 on Friday February 22 2019, @07:41PM   Printer-friendly
from the faster-and-faster dept.

Hiroshima University, National Institute of Information and Communications Technology, and Panasonic Corporation announced the successful development of a terahertz (THz) transceiver that can transmit or receive digital data at 80 gigabits per second (Gbit/s). The transceiver was implemented using silicon CMOS integrated circuit technology, which would have a great advantage for volume production. Details of the technology will be presented at the International Solid-State Circuits Conference (ISSCC) 2019 to be held from February 17 to February 21 in San Francisco, California [1].

The THz band is a new and vast frequency resource expected to be used for future ultrahigh-speed wireless communications. IEEE Standard 802.15.3d, published in October 2017, defines the use of the lower THz frequency range between 252 gigahertz (GHz) and 325 GHz (the "300-GHz band") as high-speed wireless communication channels. The research group has developed a single-chip transceiver that achieves a communication speed of 80 Gbit/s using the channel 66 defined by the Standard. The research group developed a 300-GHz-band transmitter chip capable of 105 Gbit/s [2] and a receiver chip capable of 32 Gbit/s [3] in the past few years. The group has now integrated a transmitter and a receiver into a single transceiver chip.

"We presented a CMOS transmitter that could do 105 Gbit/s in 2017, but the performance of receivers we developed, or anybody else did for that matter, were way behind [3] for a reason. We can use a technique called 'power combining' in transmitters for performance boosting, but the same technique cannot be applied to receivers. An ultrafast transmitter is useless unless an equally fast receiver is available. We have finally managed to bring the CMOS receiver performance close to 100 Gbit/s," said Prof. Minoru Fujishima, Graduate School of Advanced Sciences of Matter, Hiroshima University.


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  • (Score: 1) by fustakrakich on Saturday February 23 2019, @05:30PM (2 children)

    by fustakrakich (6150) on Saturday February 23 2019, @05:30PM (#805658) Journal

    The metal case makes a pretty good Faraday cage. On the other hand you could just throw the chips into a cardboard box, give them some power, and it's off to the races. And if the signal makes it out to the parking lot, then all my other concerns about the range are alleviated

    --
    La politica e i criminali sono la stessa cosa..
  • (Score: 0) by Anonymous Coward on Saturday February 23 2019, @06:09PM (1 child)

    by Anonymous Coward on Saturday February 23 2019, @06:09PM (#805677)

    The case /might/ make a good cage for a signal with a frequency this high, but it sure as hell isn't stopping WiFi. Given that the transmitters will in all likelyhood be black boxes, there's really no way of knowing exactly what is being transmitted and to whom without some very expensive equipment.

    • (Score: 1) by fustakrakich on Saturday February 23 2019, @06:32PM

      by fustakrakich (6150) on Saturday February 23 2019, @06:32PM (#805684) Journal

      Given that the transmitters will in all likelyhood be black boxes, there's really no way of knowing exactly what is being transmitted and to whom without some very expensive equipment.

      Then we should assume everything is being transmitted and recorded and stop worrying about it. We have the same tools at our disposal. They're easy to catch. Just nail 'em hard when you do.

      --
      La politica e i criminali sono la stessa cosa..