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18 December 2019

Laplace-Barrier Reconfigurable Liquid Electronics

Laplace barriers allow pressure-directed, reversible liquid-metal-to-liquid-metal RF connections that reduce problematic gallium diffusion. Tests of variable Laplace barrier dimensions in a reconfigurable microstrip transmission line, operating at 0.5 to 5.0 GHz, show potential for future all-liquid reconfigurable RF electronic circuits that limit liquid-to-solid metal connections.


Simple 54-63-GHz Tx/Rx 2-D-Scanning Arrays at 30-Gbps

New 64- and 128-element transmit/receive phased-arrays in stacked 2x2 SiGe chips can cover 54-63 GHz with 40-45-dBm effective isotropic radiated Tx power. They achieved 64-QAM Tx data rates of 30-Gbps using full instantaneous bandwidth, showing it is possible to build phased-arrays at 60 GHz using simple chips with low antenna distribution loss.
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Microwave Acoustics & Mechanics (IC-MAM, Munich, 13-15 July)

The International Conference on Microwave Acoustics and Mechanics (IC-MAM, Munich, 13-14 July) seeks papers in all areas of new materials, manufacturing processes, components, and devices significant for the future of RF, microwave, mm-wave and THz devices, circuits and systems based on RF-MEMS and Acoustics. Submissions due by 13 April 2020.
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mmWave 3-D Imaging Testbed with MIMO Array

A Ka-band millimeter-wave imaging testbed uses a multiple input, multiple output (MIMO) array to reconstruct 3-D images for non-intrusive security detection. A modified MIMO back-projection algorithm achieves high-precision imaging, and two-step calibration outperforms state-of-the-art convex optimization in computational efficiency and image quality.
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Radio & Wireless Week, San Antonio, 25-29 Jan.

Reserve hotel rooms by 1 Jan. for Radio & Wireless Week (RWW, 25-29 Jan., 2020, San Antonio, TX), which includes conferences focusing on the intersection of wireless communication theory, systems, circuits, and device technologies, including RWS (RF/microwave), PAWR (power amps), WiSNet (sensors), SiRF (silicon technologies), and SHaRC (space technologies).
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Superheterodyne THz Wireless Communication Link

Point-to-point wireless links (operating around 300 GHz) are realized with all-electronic components based on monolithic mmWave integrated circuits fabricated in InGaAs metamorphic high-electron-mobility technology. The superheterodyne approach proved the most promising, complying with new IEEE 100 Gbps wireless standards and compatible with currently available modems. One version combined 300 GHz Tx/Rx with off-the-shelf up- and down-converters operating at a center frequency of 10 GHz, achieving data rates of up to 24 Gbps. A second version employed a fast arbitrary waveform generator to up-convert baseband data, reaching data rates up to 60 Gbps over distances up to 10 meters.
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MTT-S Satellite Challenge: Phase 1 Winners

Microwave Theory and Techniques Society Sat Challenge selected 11 proposals (out of a field of 17) to receive seed-funding prizes of US$3,500 to flesh out their designs and, possibly, win a slot on a future orbital launch. The selected teams represent Tokyo Institute of Technology, the University of Bremen (Germany), Embry-Riddle Aeronautical University (USA), BTU Cottbus-Senftenberg (Germany), the University of Texas at Dallas, the University of Minnesota (two teams), Oklahoma State University, Florida State University, the University Teknologi MARA (Malaysia), and the University of Stuttgart (Germany). For more information on the proposals, click the link and scroll down to "Phase 1."
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GaAs/AlAs THz Quantum-Cascade Lasers for Spectroscopy

THz quantum-cascade lasers (QCLs) based on GaAs/AlAs heterostructures operate at application-defined emission frequencies from 3.4 to 5.0 THz. With narrow line widths and large tuning ranges, these devices can serve as local oscillators in airborne or satellite-based astronomical instruments or as radiation sources for high-resolution absorption spectroscopy (e.g., determining atom and ion density in plasmas) at over 1 mW output and operating temperatures up to 70 K.
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IEEE Tech Talk Podcast

IEEE launched its Tech Talk podcast series on 6 Dec. The first episode is "Autonomous Vehicles: A Conversation" with Dr. Steve Vozar, CTO and co-founder of May Mobility, a U.S.-based startup focused on developing new types of autonomous vehicles. Dr. Vozar discusses his work with sensors, reviews other developments in the autonomous vehicle landscape, and shares the advice he’d give to an engineer looking to start a company.
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340 GHz with High-Temperature Superconducting Josephson Junction

Thanks to atmospheric attenuation, THz communication demands ultrasensitive, cost-effective receiver front-ends. An alternative to systems operating at liquid helium temperatures, this 340-GHz double-sideband fundamental mixer uses a thin-film, antenna-coupled high-temperature superconducting Josephson junction that operates from 20 K to 40 K with better performance than previous mixers.
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Coming Up: Radio & Wireless Week, Wireless and Microwave Tech

Upcoming MTT-S-sponsored meetings include: Radio & Wireless Week (ARFTG, RWS, PAWR, SiRF, WiSNeT, SHaRC, San Antonio, TX, 25-29 Jan.); Wireless and Microwave Technology (WAMICON, Sand Key, FL, 15-17 April); Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMiC, Cardiff, UK, 16-17 Apr.); Microwaves for Intelligent Mobility (ICMIM, Linz, Austria, 20-21 Apr.), and more.
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Members of the IEEE Microwave Theory and Techniques Society who want to share information about events, conferences, contests, publications, or other topics of interest to MTT-S colleagues are invited to e-mail Newsletter Working Group chair Roberto Gómez García ( and newsletter editor Douglas McCormick (


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