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19 February 2020
 
 

Neural Network Homotropic Filter Optimization

The results of iterative approaches to designing high-performance filters can depend on the choice of initial parameters, which may produce local optima but miss better solutions farther off in the design space. A homotropic approach, applied here for the first time, can improve optimizations, using an artificial neural network to replace time-consuming electromagnetic modeling. Design, simulation, and testing of an all-pole filter and a generalized Chebyshev filter validate the method.

 
 
 
 
 
 
 
 

Versatile High Output Power FMCW Radar

A new frequency-modulated continuous-wave radar system achieves the output power and high performance needed for long-range airborne target detection in a small form factor operating with a 4.25 W, 5-V USB power supply. Frequency ramps from 83 to 109-GHz with a maximum 14.8-dBm output power at the transmit-waveguide WR-10-flange over temperatures from -40 °C to +70 °C.
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Nominate an MTT-S Colleague for IEEE Fellow

The Society recently created the MTT Fellow Search Committee to help identify candidates, stimulate nominations, and help nominators produce better nomination packages by the rapidly approaching 1 March deadline. For more information, see the Fellows FAQ, or write MTT Fellow Search chair Charlie Jackson (c.jackson@ieee.org).
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Sequential Load Modulated Balanced Power Amplifier

A new RF-input sequential load modulated balanced power amplifier greatly extends high-efficiency power range across a wide bandwidth (using an over-driven class-B carrier amplifier and balanced-pair peaking amp biased in class-C mode). A demonstration device at 3.05-3.55 GHz attained 9.5-10.3-dB gain and 42.3-43.7-dBm saturated power.
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Microwave Filter Workshop (IMFW, Perugia, 28-30 Oct.)

IMFW 2020 is the first conference dedicate to the filter community organized by the IEEE Microwave Theory and Techniques Society (MTT-S), with the technical co-sponsorship of the European Microwave Association (EuMA). After this first event organized in Perugia, the conference is planned to rotate from continent to continent.
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Integrated Tunable Magnetoelectric RF Inductors

Integrated solenoid magnetoelectric inductors (based on multilayer FeGaB/Al₂O₃ magnetic cores) are designed to operate at gigahertz frequencies, high Q-factor, and inductance tunability: self-resonance >3 GHz, flat 1.4 nH inductance, and peak Q-factor ~32.7 over a a 0.3-3 GHz operating range.
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WAMICON Wireless and Microwave (Florida, 15-17 Apr.)

The 21st Wireless and Microwave Technology Conference (WAMICON 2020, Clearwater Beach, FL, 15-17 Apr.) addresses multidisciplinary wireless and RF research, with the theme, "Wireless Devices and Systems Making Mad Connections from Space to the 5G IoE."
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GHz Dual-Polarized Dual-Beam Wafer-Scale Phased-Arrays

The first fully polarimetric scalable wafer-scale phased-array transceivers using simple reticle-to-reticle stitching and integrated up/down converters to produce state-of-the-art functionality and complexity on a single chip. A 2x64-element array achieved equivalent isotropically radiated power (EIRP) of 37-38 dBm with a 3-dB bandwidth of 60-64 GHz, while a 2x 256-element array reached 42-44 dBm with a 3-dB bandwidth of 61-63 GHz per polarization. A 2x 64-element array communication link reached 12-16-Gb/s data rates per polarization at 1.3 m.
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IEEE Learning Network Offers February Discounts

This month’s discounted courses on the IEEE Learning Network offer MTT-S members hundreds of continuing professional education courses created by in-demand industry experts, with most courses offering Continuing Education Units (CEUs) or Professional Development Hours (PDHs). Until 1 March, purchase select courses on cloud computing, the smart grid, renewable energy, and much more from ILN Partners at a 30% discount with the code ILNFEB. Please make sure you’re an active IEEE member and have all of the desired products in the cart before entering the promotion code.
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Low-Cost Hybrid Bandpass Filter with SAW Resonators

A class of miniaturized, hybrid, low-cost bandpass filters employs only two kinds of circuit components: a surface-acoustic-wave (SAW) resonator and an external lumped inductor. Using a single-SAW resonator avoids complication of matching SAW-resonator pairs. A dual-path coupling scheme--one path is simply a series-type SAW resonator and the other is two SAW resonators intercoupled via an external inductor--generates two additional transmission zeros (TZs) that increase out-of-band power-rejection and enlarge stopband bandwidth, as confirmed by tests of two 418-MHz prototypes.
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Coming Up: Radio & Wireless Week, WAMICON

Upcoming MTT-S-sponsored meetings include: the Texas Symposium on Wireless and Microwaves Circuits and Systems (WMCS, Waco, TX, 2-3 Apr.), 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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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 (roberto.gomezg@uah.es) and newsletter editor Douglas McCormick (douglas.mccormick.us@ieee.org).

 
 
 
 
 


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