Wifi is set to go ultrafast and up to 100 times quicker

Daily Mail

Super-fast wifi 100 times faster than today is on the horizon using high-frequency radiation waves. US researchers have for the first time been able to send video signals using terahertz, rather than traditional microwaves. Terahertz waves, which are high-frequency radiation, allow data to travel at 50 gigabits a second. That offers streaming speeds about 100 times faster than those possible today, in which wireless networks reach a top speed of 500 megabytes. Professor Daniel Mittleman, from Brown University in the US, said: 'We showed that we can transmit separate data streams on terahertz waves at very high speeds and with very low error rates.


FCC clears path for terahertz wireless data

Engadget

Never mind the possibilities opened up by millimeter wave 5G and other many-gigahertz technologies -- the FCC is already thinking about the next generation beyond that. The Commission has voted unanimously in favor of creating a category of experimental licenses that range from 95GHz to a whopping 3THz -- effectively, the limits of usable wireless technology. The Spectrum Horizons order would let companies experiment with this ultra-high frequency tech for as long as 10 years, and would make it easier for them to sell real-world products while they're in that test phase. The measure also sets aside 21.2GHz of spectrum to share for unlicensed devices. The airwaves in question were chosen to minimize possible interference with current "governmental and scientific" uses in those areas, such as space science.


Giving keener "electric eyesight" to autonomous vehicles

MIT News

Autonomous vehicles relying on light-based image sensors often struggle to see through blinding conditions, such as fog. But MIT researchers have developed a sub-terahertz-radiation receiving system that could help steer driverless cars when traditional methods fail. Sub-terahertz wavelengths, which are between microwave and infrared radiation on the electromagnetic spectrum, can be detected through fog and dust clouds with ease, whereas the infrared-based LiDAR imaging systems used in autonomous vehicles struggle. To detect objects, a sub-terahertz imaging system sends an initial signal through a transmitter; a receiver then measures the absorption and reflection of the rebounding sub-terahertz wavelengths. That sends a signal to a processor that recreates an image of the object.


Giving keener 'electric eyesight' to autonomous vehicles

#artificialintelligence

Sub-terahertz wavelengths, which are between microwave and infrared radiation on the electromagnetic spectrum, can be detected through fog and dust clouds with ease, whereas the infrared-based LiDAR imaging systems used in autonomous vehicles struggle. To detect objects, a sub-terahertz imaging system sends an initial signal through a transmitter; a receiver then measures the absorption and reflection of the rebounding sub-terahertz wavelengths. That sends a signal to a processor that recreates an image of the object. But implementing sub-terahertz sensors into driverless cars is challenging. Sensitive, accurate object-recognition requires a strong output baseband signal from receiver to processor.


Speedy terahertz-based system could detect explosives

MIT News

Terahertz spectroscopy, which uses the band of electromagnetic radiation between microwaves and infrared light, is a promising security technology because it can extract the spectroscopic "fingerprints" of a wide range of materials, including chemicals used in explosives. But traditional terahertz spectroscopy requires a radiation source that's heavy and about the size of a large suitcase, and it takes 15 to 30 minutes to analyze a single sample, rendering it impractical for most applications. In the latest issue of the journal Optica, researchers from MIT's Research Laboratory of Electronics and their colleagues present a new terahertz spectroscopy system that uses a quantum cascade laser, a source of terahertz radiation that's the size of a computer chip. The system can extract a material's spectroscopic signature in just 100 microseconds. The device is so efficient because it emits terahertz radiation in what's known as a "frequency comb," meaning a range of frequencies that are perfectly evenly spaced.