The terahertz modem showed a speed of 1.5 Gb / s

    Japanese electronics manufacturer Rohm has developed a chip for wireless data transmission, which in the laboratory showed a speed of 1.5 Gb / s ( press release ). This is far from the limit. The developers are confident that in the future it is possible to overclock the modem to 30 Gb / s.

    This is the world's first successful implementation of such a miniature device for transmitting data in the terahertz spectrum, that is, in the range from 100 GHz to 10 THz. Previously, terahertz generators and detectors were bulky and expensive, such are used, for example, in spectrometers. The Rohm chip with an attached antenna has a size of only 1.5 x 3 cm and works both as a transmitter and receiver.

    Modulation and demodulation is carried out using a resonant tunneling diodeand a voltage controlled oscillator. Data is transmitted at a frequency of 300 GHz. According to the developers, such microcircuits can be useful for transmitting ultra-high-resolution video in televisions, projectors and computer modems. We add that terahertz radiation has specific properties: it passes through clothing, wood, plastic, ceramics, is reflected from metal and water, so terahertz tomographs are installed in airport security systems to scan luggage and people .

    Rohm promises to mass-produce microcircuits in three to four years at a price of “several hundred yen” (100 yen = $ 1.30). For comparison, the current experimental transmitters in the terahertz spectrum have a minimum size of 20 cm 2show a maximum speed of 100 Mbps. Scientific developments in that area are being carried out in the USA and Europe, reports Nikkei agency.

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