Northern Canada AP/MTT Joint Chapter

November 5th, 2020

Date: Tuesday, November 10, 2020

Time: 12:00 PM Eastern Standard Time

Duration: 1 hour

To Register: Visit this Link


Automotive Radar operating in the 77 GHz and 79 GHz bands is the largest market for mmWave systems. Consequently, a de-facto standard system architecture has evolved which is used by most devices on the market and under current development. Modern automotive radars are to a large extent software defined and enable adaptive selection of waveform parameters as well as dynamic utilization of RF subsystems such as transmit and receive channels. This flexibility is the key-enabler for implementing multi-purpose radar sensors, which can realize functions from adaptive cruise control down to automated parking all in one device. Together with the high-volume of automotive radars also comes a rapid cost-reduction. Consequently, they become more and more attractive for solving various other sensing challenges: something else they have originally been designed for.

After reviewing the state-of-the art system architecture of automotive radar sensors, this presentation will introduce some novel ideas and applications how performance of that automotive “mass-product” can be further improved and how their flexibility allows for a widespread use, far away from adaptive cruise control.

Dr. Markus Gardill
Dr. Markus Gardill
University of Würzburg

Markus Gardill is professor for Satellite Communication Systems at the chair of computer science VII – robotics and telematics at the university of Würzburg. He received the Dipl.-Ing. and Dr.-Ing. degree in systems of information and multimedia technology/electrical engineering from the Friedrich-Alexander-University Erlangen-Nürnberg, Germany, in 2010 and 2015, respectively, where he was a research assistant, teaching fellow, and later head of the team for radio communication technology.

Between 2015 and 2020 he was R&D engineer and research cluster owner for optical and imaging metrology systems at Robert Bosch GmbH. Later he joined InnoSenT GmbH as head of the group radar signal processing & tracking, developing together with his team new generations of automotive radar sensors for advanced driver assistance systems and autonomous driving.

His main research interest include radar and communication systems, antenna (array) design, and signal processing algorithms.

His particular interest is space-time processing such as e.g. beamforming and direction-of-arrival estimation, together with cognitive and adaptive systems. He has a special focus on combining the domains of signal processing and microwave/electromagnetics to develop new approaches on antenna array implementation and array signal processing. His further research activities include distributed coherent/non-coherent networks for advanced detection and perception, machine-learning techniques for spatial signal processing, highly-flexible software defined radio/radar systems, and communication systems for NewSpace.

Markus Gardill is member of the IEEE Microwave Theory and Techniques Society (IEEE MTT-S). He served as co-chair of the IEEE MTT-S Technical Committee Digital Signal Processing (MTT-9), regularly acts as reviewer and TPRC member for several journals and conferences, and currently serves as associate editor of the Transactions on Microwave Theory and Techniques. He is a Distinguished Microwave Lecturer (DML) for the DML term 2018-2020 with a presentation on signal processing and system aspects of automotive radar systems.

October 27th, 2020

Date: October 27, 2020

Time: 12:00 PM Eastern Daylight Time

Duration: 1 hour

To Register: Visit this Link


The superior electron transport properties associated with InP-based transistors significantly exceeds those of its SiGe HBT, CMOS, and GaN counterparts. Since 2000, the transistor and MMIC community has witnessed the bandwidths of InP HBTs and HEMTs skyrocket past 100-GHz to where they now exceed 1-THz operation. With this rapid increase in bandwidth, amplifiers and MMICs have been demonstrated operating at G-band, sub-millimeter wave (>300-GHz), and THz frequencies where a world-class suite of results has been generated and are well known to the high-frequency community. However, only recently have these THz devices been used for amplifier and MMIC development at lower V-, W-, and D-band frequencies, where state-of-the-art performance has been demonstrated as well. This InP-transistor technology advancement is very different than what has transpired for SiGe HBT, CMOS, and GaN – instead, these technologies have incrementally increased their bandwidths, and in doing so, so has the operating frequency of circuits employing such devices – this is a key reason why InP is overshadowed by these other technologies when amplifiers and MMICs operating at mm-Wave are discussed and reviewed. This talk will review the development of high power solid-state power amplifiers operating between 50-250 GHz using the 250-nm InP HBT technology at Teledyne Scientific. The high maximum oscillation frequency f,max of the technology, combined with a 5-V breakdown voltage has permitted high-gain, world-class mm-wave and THz PA’s to be realized. After review of the underlying InP HBT technology and comparison with competitive technologies, the key design trade-offs for mm-wave and THz PA design will be reviewed – they include appropriate HBT topology, choice of wiring environment, DC bias distribution, sources of instability, PA-cell power matching, and RF combining methods. A review of state-of-the-art PA results between 50-250 GHz will be reviewed. Technology challenges and limitations maintaining high transistor W/mm operation above 200 GHz will be discussed. Lastly, system examples will be presented to show the prospects and opportunities these high-frequency InP HBT PA’s have in next generation communication (5G and 6G), radar, and instrumentation systems.

Dr. Zach Griffith is a Principle Engineer in the area of mm-wave and RF MMIC design with the Teledyne Scientific Company. In 2005 he received the Ph.D. in electrical engineering from UC Santa Barbara related to his work demonstrating record bandwidth InP HBT transistors. Since joining Teledyne in 2008, his efforts transitioned to InP HBT and HEMT MMIC design – design accomplishments include high-linearity mm-wave op-amps, broadband SPDT switches, traveling wave amplifiers, full waveguide band power amplifiers at V-, W-, and D-band, and G-band power amplifiers with record RF power. His current focus is on the continued development of 50-250 GHz PA’s and their commercial product transition. For 18 years Dr. Griffith has participated in the demonstration of InP HBT transistors and integrated circuits with record performance. He is a Senior Member of IEEE, has authored over 140 publications, and holds six patents associated with this work.  

July 29th, 2020

Title: What is My Measurement Equipment Actually Doing? Implications for 5G, mm-Wave and Related Applications

Date: Tuesday, August 11, 2020

Time: 12:00 PM Eastern Daylight Time

Duration: 1 hour

To Register: Visit this Link


Current microwave and high frequency instrumentation perform many tasks behind the scenes, even more so in the mm-wave and high modulation rate regimes, and it is easy to lose track of how the equipment, the processing algorithms, the setup and the signals are interacting. By exploring the measurement mechanics within some common instruments under practical conditions, it may be easier to understand where sensitivities or anomalies might increase and how to mitigate them. Through a study of example architectures and measurements, including those in the 100+ GHz range and those with wide modulation bandwidths where linearity, dynamic range and other physical metrics are stressed even more, mechanisms and ideas for better measurements will be explored.


Jon Martens (M’91 – S’10) received the BSEE, MSEE and Ph.D. in Electrical Engineering from the University of Wisconsin in 1986, 1988 and 1990, respectively. Since 1995, he has been with Anritsu where he is currently an Engineering Fellow. His research interests include measurement system architectures, millimeter-wave circuit and system design, and a wide range of microwave measurement processes to include materials analysis, nonlinear and quasi-linear characterization, optical interactions and calibration. He is the inventor or co-inventor on over 17 patents, has (co-)authored several book chapters and over 50 technical publications. Dr. Martens is a past chair of the MTT measurements technical subcommittee and is a past president of the measurements society ARFTG and is still active in both. He is a member of the technical program subcommittees for the International Microwave Symposium and ARFTG and is a former associate editor for the Transactions on Microwave Theory and Techniques.

July 27th, 2020

Overview: Millimeter-Wave GaN Power: The Technology to Power 5G and the Future

Title: Millimeter-Wave GaN Power: The Technology to Power 5G and the Future

Date: Tuesday, July 28, 2020

Time: 12:00 PM Eastern Daylight Time

Duration: 1 hour

To Register: Visit this Link


The emergence of 5G cellular has created new interest in the millimeter-wave spectrum. This frequency band (30 to 300 GHz) remains a great untapped resource that must be utilized in order to realize the goals (5G and beyond) of the Internet and cell phone industries. There simply is not enough bandwidth at lower frequencies to satisfy future system requirements for speed and capacity. The millimeter-wave spectrum is also of great interest to military and industrial planers, where the enhanced resolution provided by greater bandwidths is necessary to meet future systems goals. Fortunately, a new device/materials technology has emerged which can meet these requirements. This is GaN on SiC substrates.  MMICs fabricated with this high bandgap materials offer a factor of 10 improvement in the power density compared with older technologies such as GaAs and InP. This talk will focus on GaN MMIC technology and how it can address industry (commercial and military) power needs at millimeter-wave frequencies. I will first present where the technology currently is in terms of power, efficiency and frequency, and then present where it is headed. I will also present the factors limiting performance and cost and offer possible solutions.

Sponsored by:


James Schellenberg

James Schellenberg

James Schellenberg received the B.S. degree in electrical engineering from Fresno State University, Fresno, CA in 1969, and the M.S. degree in electrical engineering from Johns Hopkins University, Baltimore, MD, in 1973.

From 1969 to 1978, he was employed by Westinghouse Electric Corporation, Advanced Technology Laboratories, in Baltimore, MD where he was responsible for bipolar and FET power amplifier/combiner design. From 1978 to 1988 he was employed by Hughes Aircraft Company, Microwave Products Division, in Torrance, CA. There he was responsible for many industry firsts in GaAs hybrid/monolithic IC technology, particularly at millimeter-wave frequencies. From 1988 to 2005 he was with Schellenberg Associates developing power MMICs for millimeter-wave applications. From 2005 to 2008 he was with Trex Enterprises in Kahului, HI developing mm-wave imaging radar. In 2008 he joined QuinStar Technology as their Chief Engineer. At QuinStar he established and led a MMIC group developing millimeter-wave power MMICs. He retired from QuinStar in 2019.

Mr. Schellenberg is the inventor of the radial-line power combiner (U.S. Patent No. 4,234,854) and the Dolph-Tchebycheff planar power combiner (U.S. patent 4,835,496) and has pioneered the development of hybrid/monolithic FET amplifiers/oscillators at millimeter-wave frequencies. He has been awarded the 1978 IR-100 Award for the FET radial line power combiner and the 1981 ISSCC Beatrice Winner Award. Having published more than 70 technical papers and authored 8 U.S. patents, he is a recognized authority of solid-state power amplifier design at microwave/millimeter-wave frequencies. His current research interests include nonlinear analysis/modeling of power amplifiers, high-power broadband amplifiers/combiners and millimeter-wave GaN power amplifiers.

May 13th, 2020

MTT has decided to create a series of DML Virtual talks, where members can interact and discuss with experts on the microwave field. Next webinars are scheduled on:

5/14/2020 – Payam Heydari – Transceiver Architectures for Beyond-5G: Challenges and R&D Opportunities, co-organized with SSC-S

5/28/2020 – Jim Hwang – Broadband Label-free Noninvasive Electrical Characterization of Live Biological Cells

6/30/2020 – Ruonan Han – Chip-Scale Wave-Matter Interactions at RF-to-Light Frequencies: Circuits, Systems and Applications

More information will be included in the webpage:

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