Multilayer THz Packaging for Photodiode Arrays

A novel, 3-D multilayer packaging technology integrates indium phosphide terahertz photodiodes with a rectangular waveguide power combiner made of metallized glass-reinforced epoxy. The objective is low-cost packaging technology for coherent power combining in the THz regime. In principle, the packaging method can be applied to planar arrays of any photonic or electronic devices.
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TryEngineering STEM Lesson Toolkit Webinar, 17 Sept.

The TryEngineering Lesson Plan Toolkit is a self-contained, how-to resource to help STEM volunteers reach out--in person or virtually--to help teachers and students get excited about engineering. At 12 p.m. ET on 17 Sept., TryEngineering team members Lorena Garcia and Lynn Bowlby will show how the toolkit works and answer questions.
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Position-Independent Parameter Measurement of Magnetodielectric Materials

Magnetodielectric materials have significant advantages for miniaturized and wide-bandwidth antennas, but precise permeability and permittivity measurements are crucial. A new method improves the on standard Nicolson-Ross-Weir approach by deriving the sample's position by matching phasor angles of the reflection coefficients at the sample surfaces, eliminating error-prone manual measurements.
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Watch It Live: Measurement and Judging of Student High-Efficiency PA Contest

Watch live on 16 Oct. as the judges evaluate the entries in the 16th High Efficiency Power Amplifier Student Design Competition. The judging will be streamed in real time from the labs of Keysight Technologies, which sponsors the contest in collaboration with the MTT-S Microwave High Power Techniques Committee (MTT-12). The time and URL will be announced at the contest page on MTT.org.
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Hybrid UHF/UWB Medical RFID Tag Harvests Energy at 51 Meters

A new ultrahigh frequency/ultrawideband hybrid RFID has attained record energy-harvesting sensitivity in the UHF band. The tag's design makes it sensitive to near-field motions like heartbeats and respiration, allowing remote, wearable vital sign sensing. The tag consists only of a custom CMOS integrated circuit and the UHF/UWB antennas. It draws about 1 microwatt, and can be powered wirelessly at up to 51 m by a 4-W UHF transmitter.
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Calls for Papers: Microwaves OA, Quantum Information, COVID-19

The new, open-access IEEE Journal of Microwaves, which began accepting papers on 1 Sept. Publication begins in January. And remember, 30 Sept. is the deadline for two special issues: the IEEE Transactions on Quantum Engineering (TQE) on "Classical Control Systems for Quantum Information Applications" and the IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (J-ERM) issue on "COVID-19 related Emergency Methods and Systems."
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Flexible, Wearable, Energy-Harvesting mmWave Broadband Rectenna

The first flexible, broadband mmWave rectenna on wearable textile substrate on covers the spectrum 23 to 40 GHz, with a minimum radiation efficiency of 67% up to 30 GHz, an improvement of 3-dB on the compared a standard patch. A textile reflector plate allows a stable 8-dB gain. The integrated rectenna demonstrated more than 1.3-V dc output from 12 dBm of mmWave wireless power across a 28% fractional bandwidth from 20 to 26.5 GHz, and peak output of 6.5 V from 20 dBm at 24 GHz.
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MTT-S Webinars: Build Your Own Continuous-Wave FM Radar at Home

Stay up to date with free MTT-S webinars. Catch previous presentations or sign up for upcoming programs like "NCSU Rabbit Radar: Design, Simulate & Build Your Own Frequency Modulated Continuous Wave Radar" with David Ricketts (NCSU) on 29 Sept., "Low Phase Noise Signal Generation Using Oscillators, Resonators & Filters and Atomic Clocks" with Jeremy Everard (University of York) on 13 Oct., "50-250 GHz Power Amplifier MMICs" with Zach Griffith (Teledyne) on 27 Oct., and many more.
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New Holographic Inversion Theory Applied to Whole-Body Security Scanning

Experiments with an in-house LFM-radar prototype (operating at 29.9-GHz central frequency and bandwidth of 5.8 GHz) validate a new general theory of holographic image reconstruction and an associated holographic inversion algorithm. The prototype produced images with spatial resolution of about 5 mm, revealing concealed metallic and nonmetallic objects in realistic scenarios.
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Coming Up: Electronic Packaging, Wireless Power, Wireless and Microwave Technology

Upcoming MTT-S sponsored conferences include: Design and Analysis Frontier for Electronics Packaging (EPEPS, virtual, 4-7 Oct.); Wireless Power (WPTC, virtual & Seoul, 15-19 Nov.); Wireless and Microwave Technology (WAMICON, Clearwater Beach, FL, 1-3 Dec.), Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO, Hangzhou, China, 7-9 Dec.), and others.
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