Northern Canada AP/MTT Joint Chapter

IEEE
February 15th, 2012

Welcome to the IEEE Northern Canada AP/MTT Jt. Chapter website!

The Antennas and Propagation Society and the Microwave Theory and Techniques Society are two predominant societies in the IEEE with thousands of members, massive international conferences, and numerous publications. This website will contain information on upcoming chapter activities, information about our two parent chapters, and resources for graduate and undergraduate students. Below is a map of the NCS governing area.

 


January 16th, 2021

Time: May 3rd, 2021 at 11am MDT

Speaker: Dr. Quevedo-Teruel at KTH Royal Institute of Technology

Oscar Quevedo-Teruel is a Senior Member of the IEEE. He received his Telecommunication Engineering Degree from Carlos III University of Madrid, Spain in 2005, part of which was done at Chalmers University of Technology in Gothenburg, Sweden. He obtained his Ph.D. from Carlos III University of Madrid in 2010 and was then invited as a postdoctoral researcher to the University of Delft (The Netherlands). From 2010-2011, Dr. Quevedo-Teruel joined the Department of Theoretical Physics of Condensed Matter at Universidad Autonoma de Madrid as a research fellow and went on to continue his postdoctoral research at Queen Mary University of London from 2011-2013.

In 2014, he joined the Division for Electromagnetic Engineering in the School of Electrical Engineering and Computer Science at KTH Royal Institute of Technology in Stockholm, Sweden where he is an Associate Professor and Director of the Master Programme in Electromagnetics Fusion and Space Engineering. He has been an Associate Editor of the IEEE Transactions on Antennas and Propagation since 2018 and is the founder and editor-in-chief of the EurAAP journal Reviews of Electromagnetics since 2020. He was the EurAAP delegate for Sweden, Norway, and Iceland from 2018-2020, and he has been a member of the EurAAP Board of Directors since January 2021. He is a distinguished lecturer of the IEEE Antennas and Propagation Society for the period of 2019-2022, and Chair of the IEEE APS Educational Initiatives Programme since 2020.

He has made scientific contributions to higher symmetries, transformation optics, lens antennas, metasurfaces, leaky wave antennas and high impedance surfaces. He is the co-author of 95 papers in international journals and 140 at international conferences.

Abstract

Fig. 1: Transformation of a cylindrical wave into a plane wave by using a convex lens represented with rays and waves.

Lens antennas are commonly englobed in a more general type of antennas, named aperture antennas. As their name indicates, they make use of a lens to modify the field distribution at the aperture of the antenna, which is typically fed by a single source. The lens is employed to transform the waves arriving from the source into a desired radiation pattern. Commonly, the desired radiation pattern is a directive beam in a given direction. However, similar to arrays, reflectors or leaky wave antennas, the goal changes depending on the application. For example, other desired features may be to produce multiple beams, or a broad beam-width.

Lenses were more commonly employed in optical applications. For this reason, most of the nomenclature comes from optics, and they are evaluated with rays theory. In this sense, the performance of the lens is conventionally described in terms of aberrations. An aberration is a failure of the rays to converge at the desired focus. This failure must be due to a defect or an improper design. Aberrations are classified as chromatic or monochromatic, depending on whether or not they have a frequency dependence. There are five monochromatic aberrations: spherical aberration, coma, astigmatism, Petzval field curvature, and distortion. However, this is not a common nomenclature for antenna designers in the radio-frequency and microwave regimes. In these regimes, the rays are substituted by electromagnetic fields, and the designers evaluate their antennas in terms of directivity, gain, efficiency, side lobe levels, cross polarization levels, etc. Therefore, there is a communication gap between both communities: optics and microwaves. In the THz regime, which is in between these two communities, researchers must understand both nomenclatures

In this talk, I will explain the operation of lens antennas, their potential, and two innovative techniques that have become very important in recent years. The first technique is transformation optics, which can be employed to produce three-dimensional directive lenses. The second one is metasurfaces, which can be used to produce low-cost and planar two-dimensional lenses. In the case of metasurfaces, fully metallic solutions are possible, which is a clear advantage in terms of losses. However, with the available technology, metasurfaces are only able to scan in one single plane. Finally, we introduce the concept of higher symmetries, that can be employed to enhance the bandwidth of conventional metasurfaces, or to increase their equivalent refractive indexes.


January 6th, 2021

Date: Tuesday, January 12, 2020

Time: 12:00 PM Eastern Standard Time

Duration: 1 hour

To Register: Visit this Link

Abstract:

Recent progress in semiconductor devices on compound semiconductor or silicon substrates has made it possible to produce more power and receive a signal with less noise at THz frequencies. Various integrated circuits for the THz radio front-end functional blocks, including power and low-noise amplifiers, modulators and demodulators, and oscillators, have been demonstrated in the last decade. In the first experimental demonstration conducted in 2004, bulky instruments originally developed for THz spectroscopy were used to transmit pulsed THz signals carrying a 7-kHz bandwidth audio signal across a short free space. However, recently, there have been several successful demonstrations of multi-Gbps data transmissions at THz frequencies with state-of-the art devices and components. In this talk, the first prototype of a THz wireless communications system designed under the ‘touch-and-go’ scenario will be presented. I clarify the concept of the KIOSK data downloading system, cover some considerations in this work, and present a brief link-budget plan. We will then overview technologies for implementing THz components operating at 300 GHz and their performance, followed by preliminary investigation of the channel responses and the experimental demonstration results. At the end of the presentation, we will discuss several issues that need to be addressed for the future of the THz communications systems, in terms of system architectures, packaging and potential applications.

Dr. Ho-Jin Song

Dr. Ho-Jin Song

Nippon Telegraph and Telephone

Ho-Jin Song received the B. S. degree in electronics engineering from Kyungpook National University, Daegu, Korea in 1999, and the M.S. and Ph.D. degree in electrical engineering from Gwangju Institute of Science and Technology (GIST), Gwangju, Korea, in 2001 and 2005, respectively. Since he joined Nippon Telegraph and Telephone, Japan in 2006, which is the third largest telecommunication company in the world, he had engaged in the development of sub-millimeter and terahertz wave devices, circuits and systems for communication, remote sensing and imaging applications. In 2015, he was named to a distinguished research scientist of NTT Labs. Since 2016, Dr. Song has been with the department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Korea. His current research interest includes mm-wave and terahertz circuits, antenna, packages and test-bed systems, particularly for wireless communication, connectivity and radar applications. Dr. Song was a recipient of GIST Best Thesis Award (2005), NTT Labs Research of the Year Award (2009 and 2014), Young Scientist Award of Spectroscopical Society of Japan (2010), IEEE Microwave and Wireless Component Letters Tatsuo Itoh Best Paper Award (2014) and Best Industrial Paper Award at IEEE MTTs-IMS 2016 (2016). He is a senior IEEE member and an IEEE distinguished microwave lecturer for the 2019-2021 term.


November 5th, 2020

Date: Tuesday, November 10, 2020

Time: 12:00 PM Eastern Standard Time

Duration: 1 hour

To Register: Visit this Link

Abstract:

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
Professor
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

Abstract:

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.

Presenter
 
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

Abstract:

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.

Presenter

JON MARTENS
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.

  • Simple Calendar

    2021 January

    Sun Mon Tue Wed Thu Fri Sat
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31