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October 2021

Low-Loss PTFE Porous Fiber for 6G THz Transmission

Hexagonal porous optical fibers of polytetrafluoroethylene (PTFE)--without a central defect--demonstrate better transmission than either PTFE bulk rod or photonic crystal fibers (with central defects) in the 0.1-0.33 THz frequency range. THz time-domain measurements confirmed that the porous fibers' transmission characteristics were almost an order of magnitude better than bulk rod in the 6G transmission window.


Mini-Circuits’ wideband MMIC amplifiers with positive gain slope are ideal solutions to compensate for frequency dependent gain roll-off in your system without sacrificing overall gain or RF link budget. See how these amplifiers can help meet gain flatness requirements in long cable runs, wideband transceivers and more.


Dual-Band Reception via a Single Bolometer

The Antarctic Five-Meter Dome A Terahertz Explorer (DATE5) telescope will need to make simultaneous observations in the 0.85 THz and 1.35 THz bands. A proposed dual-band receiver is based on a single quasi-optical superconducting hot-electron bolometer (HEB) mixer, a novel concept allowing simultaneous observation of both bands.
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MWCL RF Sensor Issue Deadline Extended

The deadline has been extended to 1 Nov. for authors to submit papers for the March 2022 IEEE Microwave and Wireless Components Letters special issue on radar and microwave sensor systems. The editors seek papers demonstrating new microwave and mmWave systems, beamforming, MIMO, passive and networked radars, and imaging, among many other topics.
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Non-Contact Read of THz Antenna Parameters

A new measurement technique characterizes antenna parameters without contact, including port reflection coefficient, gain, and radiation pattern. The approach does away with active measurement port connections to the antenna under test, instead treating the test antenna input port and the port of the measurement device as a 2-port open-air fixture.
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Connect With the IEEE STEM Summit, 1-6 Nov.

Are you an IEEE member interested in pre-university STEM outreach or an active IEEE volunteer already engaged in STEM outreach? If so, the IEEE STEM Summit is for you. Sign up and join the discussion via IEEE Collabratec or Facebook throughout the week of 1-6 Nov. Presentations generally run 11 a.m. to 12:30 p.m., followed each day by a PreU STEM Expo.
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The V16 webinar series for developing RF to mmWave systems continues 10/19 with Advanced Antenna Design and Integration and 11/2 with Intelligent Cross-Platform Workflows for RF PCB Integration.


5G communication specifications are reaching beyond the capabilities of incumbent technologies. Learn how Wolfspeed GaN on SiC technology can assist base station PA designers in meeting these evolving requirements.


Real-Time mmWave Channel Sounding via Switched Beamforming

A new 28.5-GHz channel sounder switches through all antennas of multiple dual-polarized 8 x 8 phased arrays at the transmitter and receiver and performs beamforming in postprocessing through digital weights to synthesize a sweepable beam. The system relies on highly stable rubidium clocks and local oscillators coupled with precision over-the-air calibration techniques.
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MTT-S Webinar: Additive Manufacturing for Wireless Avionics

Join Eduardo Rojas at 9:00 a.m. Eastern time on Tuesday, 12 Oct., this month's MTT-S Second Tuesday webinar, "Advancements on Additive Manufacturing of Wireless Electronics for Aviation and Space Environments." Dr. Rojas is an assistant professor at Embry-Riddle Aeronautical University, where his research focuses on microwave/mmWave circuits and additive manufacturing.
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Multipass THz MIMO Sparse Imaging

An advanced THz multiple-input-multiple-output near-field sparse imaging target-detection scheme uses single-pass synthetic aperture focusing and multipass interferometric synthetic aperture focusing to improve imaging effectiveness and efficiency, capitalizing on a linear sparse periodic array and random undersampling to reduce data volume and system cost.
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Renew MTT-S and IEEE Memberships Now

Renew your memberships to continue developing your career, accessing essential networking opportunities, and receiving other exclusive IEEE benefits—including discounted memberships for IEEE Societies. Enhance your IEEE membership by joining a Society specializing in your technical interests for as little as US$10 per year, and join Technical Communities without charge.
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Efficient 3.6 kW/m² Wireless mmWave Power Transmission

A new GaN nano-Schottky diode rectifier boasts 381 fF/mm capacitance per unit gate width and 0.45 Ω ·mm series resistance. The device demonstrated 61.5% RF-dc efficiency at 95 GHz at an input power density of 3.61 kW/m² (a 15.7% increase in efficiency over the state-of-the-art W-band rectenna circuits). The input power handling also increased by factors of 1.5 and 9.5 from reported GaAs and CMOS-based rectenna circuits at 94 GHz.
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Coming Up: Microwave Filters, COMCAS

Upcoming MTT-S sponsored conferences include: Microwave Filters (IMFW, Perugia, Italy, 17-19 Nov.), Microwaves, Communications, Antennas, Biomedical Engineering & Electronic Systems (COMCAS, Tel Aviv, 1-3 Nov.), , BiCMOS and Compound Semiconductor ICs (BCICTS, Monterey, CA, 5–8 Dec.), Microwaves and RF (IMARC, Lucknow, India, 17-19 Dec. ), European Microwave Week (EuMIC, EuMC, EuRAD, London, 12-18 Feb. 2022), and more.
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Have Something to Share With MTT-S Colleagues?

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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