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RF Design for Ultra-Low-Power Wireless Communication Systems: Efficiently Miniaturizing and Passively Sensing

Tuesday, January 18th, 2022

Thursday, Jan. 26 2022, 10:00 am (MST)

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Speaker:

Distinguished Microwave Lecturer: Dr. Jasmin Grosinger

Jasmin Grosinger (Senior Member, IEEE) received the Dipl.-Ing. (M.Sc.) degree (Hons.) in telecommunications and the Dr.techn. (Ph.D.) degree (Hons.) from the Vienna University of Technology, Vienna, Austria, in 2008 and 2012, respectively. In January 2021, she received her Venia Docendi in RF and microwave engineering from the Graz University of Technology, Graz, Austria.Prof. Grosinger was involved with various projects dealing with RFID at the Institute of Telecommunications, Vienna University of Technology, from 2008 to 2013, and with RFID sensor project with Disney Research in Pittsburgh 2011. From 2013 to 2017, she was a Post-Doctoral Researcher with the Institute of Microwave and Photonic Engineering, Graz University of Technology, focusing on RFID technologies research, where she became an Assistant Professor in 2017, and an Associate Professor in 2021. In 2018, 2019, and 2021, she was a Guest Professor at the Institute of Electronics, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Germany. She has authored more than 60 peer-reviewed publications and holds one U.S. patent.Prof. Grosinger is actively involved in the Technical Program and Steering Committees of various RF-related conferences and is an Associate Editor of the IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS. She is a member of the IEEE Microwave Theory and Techniques Society (MTT-S) and the Union Radio-Scientifique Internationale Austria (Commission D). Within MTT-S, she serves as a Distinguished Microwave Lecturer (Tatsuo Itoh DML class of 2022–2024), a member of the IEEE MTT-S Technical Committees MTT-25 Wireless Power Transfer and Energy Conversion Committee and MTT-26 RFID, Wireless Sensors and IoT Committee, and as the Co-Chair of the Women in Microwaves Sub-Committee of the Member and Geographic Activities Committee. In 2022, she serves as the MTT-S AdCom Secretary.

Abstract

In this talk, I will present radio frequency (RF) design solutions for wireless sensor nodes
to solve sustainability issues in the Internet of things (IoT), which arise due to the massive
deployment of wireless IoT nodes on environmental and economic levels. Engineers can apply
these RF design solutions to improve the ultra-low-power operation of IoT nodes, avoid batteries’
eco-toxicity, and decrease maintenance costs due to battery replacement. The presented solutions
offer high integration levels based on system-on-chip and system-in-package concepts in lowcost complementary metal-oxide-semiconductor technologies to limit costs and carbon footprints
of these nodes.
Within this research context, I will present solutions for ultra-low-power wireless
communication systems based on high frequency (HF) and ultra-high frequency (UHF) radio
frequency identification (RFID) technologies. In particular, I will present RF design solutions for
HF and UHF RFID systems that reveal how to develop passive miniaturized IoT nodes that
operate robustly in harsh application environments and how to create batteryless or rather passive
IoT nodes, which provide passive sensing capabilities and work robustly in their respective
application environment.

IEEE NCS AP-S/MTT-S Chapter Virtual Workshop

Wednesday, November 24th, 2021

NASA’s SunRISE: Understanding Solar Particle Storms Using an Array of Cube Satellites

Thursday, Dec. 2 2021, 2:00 pm (MST)

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Speaker: Jim Lux: SunRISE Project Manager, NASA JPL

Jim Lux is the Project Manager for SunRISE – six smallsats forming a radio interferometer that will image the sun at frequencies below 20 MHz. He managed the development and operations of DHFR, which measured HF signals from 5-30 MHz in a 500km orbit, above the ionosphere. Mr. Lux was the JPL Principal Investigator for NASA’s SCaN Testbed, which was installed on the International Space Station from 2012 to 2019, for which he received the NASA Exceptional Achievement Medal. A licensed professional engineer in California, Mr. Lux has been at JPL for 22 years, following award winning work in physical special effects for film and TV, design and development of electronic warfare and signals identification systems, and large distributed software systems for database and dispatch applications.

Abstract

NASA’s Sun Radio Interferometer Space Experiment (SunRISE) is an array of six small spacecraft, each about the size of a toaster oven, forming a radio interferometer that will image the Sun at frequencies below 25 MHz. The mission has begun implementation phase and will be launched no earlier than July 2023. SunRISE will help us understand our nearest star and better protect astronauts traveling beyond Earth. It will study how the Sun generates and releases giant space weather storms — known as solar particle storms — into planetary space. Besides improving our understanding of the solar system, this ultimately provides better information on how the Sun’s radiation affects the space environment that astronauts must travel through.

IEEE NCS AP-S/MTT-S Chapter Workshop

Tuesday, October 12th, 2021

Hands-On Automation and Scripting for Ansys Electronics Desktop (AEDT) Using Python

Thursday, Oct. 14 2021, 2:00 pm (MDT)

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Speaker: Dr. Sameir Deif

Sameir Deif received the B.Sc. degree in electronics and communication engineering from Mansoura University, Mansoura, Egypt, in 2007, and the M.Sc. degree in electrical engineering specialized in radio frequency (RF)/microwave circuits from the King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia, in 2013. He received his Ph.D. degree in planar microwave active and passive sensors research at the University of Alberta, Edmonton, AB, Canada in July 2020. Currently, he has been employed by Ansys since January 2021 as a Verification Engineer II

Abstract

This is a hands-on workshop for Ansys Electronics Desktop (AEDT) users. Two topics will be covered:

  1. How to use built-in scripting (IronPython) for AEDT automation. This includes creating projects, designs, handling design setups, and extracting different types of data.
  2. How to use pyAEDT for the same automation tasks. pyAEDT extends the interact with AEDT API with no limitations on Python version or data post-processing. 

Time: July 15, 2021 at 10:00 am MDT

Monday, July 12th, 2021

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Speaker: Dr. Rezvan Rafiee Alavi, DVTEST

Rezvan Rafiee Alavi (M’17) received the B.Sc. degree from the University of Tehran in 2009, in electrical engineering, and M.Sc. degree from Iran University of Science and Technology, in 2013, in telecommunication, fields and waves, and Ph.D. from University of Alberta, in 2019. Currently, she is a postdoctoral research fellow with the Intelligent Wireless Technology Laboratory (IWT), University of Alberta, and DVTEST. Inc. She is also a cofounder of Anteligen Company. She has authored more than 20 papers published in refereed journals and conferences proceedings and also three patents during her Ph.D. and postdoctoral research. Dr. Alavi was a recipient of Mary Louise Imrie Graduate Student Award, honorable mention award in APS/URSI student paper competition (2019). Her research interests include antenna and propagation, passive and active microwave circuits, numerical methods in electromagnetics, inverse electromagnetic scattering, remote sensing, antenna over the air (OTA) measurements, and the application of machine learning and artificial intelligence in antenna measurement and fault detection of antennas and microwave circuits

Abstract

Near-field to far-field transformation is a method for antenna characterization that computes the metrics defined in far-field by using mathematical transformation. This method makes it possible to have affordable very compact enclosures. Clearly, compared to direct and indirect far-field measurement methods, near-field to far-field transformation requires more near-field data correction and post-processing. This is because the distance between the probe and AUT is close, and also the collected data are used for further calculations. Therefore, any error in the collected data can propagate through all the calculations and decrease the accuracy. To correct the measured near-field data several correction methods are used as probe correction, phase center detection and correction, metallic parts and absorber effects removal. Furthermore, to reduce the measurement and post-processing time, instead of uniform sampling, an adaptive sampling technique is proposed and implemented. This method reduces the measurement and post-processing time to the quarter of the time of the uniform sampling. In this talk, I will present the algorithm and methods we have used for NFFF transformation, NF correction, uniform and adaptive NF data acquisition. We will have a live demo of our measurement setup, adaptive sampling method and Signal Shape software that we have developed for NFFF transformation.

AP-S Distinguished Lecturer Seminar – Lens antennas: Fundamentals and present applications

Friday, May 28th, 2021

Time: June 14th, 2021 at 1:30 pm EDT

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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.

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