Tag Archives: THz

Researchers at the University of Michigan have made what is in effect a very agile ruler using a novel sub-THz radar technique, and reported it last week at the International Solid-State Circuits Conference. Its 235GHz antennas and the core active components are integrated on a single IC, and across a desktop it measures the range to a target with sub-mm ...

Beams of electromagnetic radiation can be used to detect the rotation of distant objects if they have orbital angular momentum  – known as ‘vortex waves’. It involves exploiting a rotational form of the Doppler effect, and researchers from University of Shanghai for Science and Technology (USST) have managed to get the technique working at terahertz (THz) frequencies. “To the best ...

Rohde & Schwarz is aiming at 6G and sub-THz research with W-band front-ends for an IF vector signal generator and a D-band thermal power sensor. SFI100A wideband IF vector signal generator The SFI100A wideband IF vector signal generator has been developed for early 6G research, high capacity wireless backhaul, fixed wireless access and automotive radar. With an RF modulation bandwidth ...

Tokyo Institute of Technology has created a Sub-THz 6G transceiver, which will be revealed next week at the VLSI Symposium. Capable of transmission and reception at over 100GHz, and at 112Gbit/s, “by effectively suppressing the self-interference caused by the transmission signal leaking into the receiver, the proposed architecture reaches unprecedented data rates while maintaining a surprisingly compact size”, according to ...

Researchers at Austrian university TU Wien (Vienna) have created a simple and compact source of terahertz radiation, claiming that radiates significantly more power than similar devices: 10μW at its 525GHz fundamental and 70μW at 330GHz. There are various ways to generate terahertz waves. TU Wien lists cryogenic quantum cascade lasers for high intensities, or down-conversion by mixing multiple optical lasers, ...

Plasmon-coupled semiconductor surface states can down-convert 1550nm optical wavelengths to terahertz frequencies four-orders of magnitude more efficiently than non-linear optical methods, according to UCLA. When a crystal is a semiconductor – p-doped InAs in this case – the ‘surface states’ created by the left-over bonds that are inevitable on the outside of a crystal lattice can create high gradient electric ...

In a silicon-compatible parallel to fibre optics, MIT is using polymer-based ribbon waveguides to carry data between chips at 105Gbit/s – waveguide dimensions and material are chosen so that it propagates electromagnetic radiation between 200 and 335GHz, over 300mm of waveguide. To handle suitable sub-Thz frequencies, transmitter and receiver were made on a 130nm SiGe BiCMOS process using largely bipolar transistors in ...

Princeton University has found a way to determine the direction to an object in three dimensions using only on-chip THz antennas with ~2°accuracy. It exploits frequency-dispersive leaky-wave antennas – end-fed strips, 1.7mm long, with transverse slots spaced at 43μm intervals. The crucial property of these, is that injecting a frequency between 360 and 400GHz into one end results in fan ...

Osaka University has teamed up with Rohm to send 8K video at 48Gbit/s over a 300GHz carrier using a simple modulation technique. “In general, such ultra-high-speed data transmission experiments are performed using multi-level modulations via a complex system with high power consumption that uses off-line or on-line digital signal processing,” said team leader Masayuki Fujita. “The present real-time demonstration, which ...

Terahertz video at 6frame/s and with 32 x 32 pixels has been achieved by a team led by Professor Emma Pickwell-MacPherson from the University of Warwick, working with the Chinese University of Hong Kong. “Their terahertz camera reached 100 times faster acquisition than the previous state-of-the-art without adding any significant costs to the system or sacrificing the sub-picosecond temporal resolution needed ...