42nd Annual Meeting and Symposium of the Antenna Measurement Techniques Association (AMTA)

Welcome to the 42nd Annual Meeting and Symposium of the AMTA. Rohde & Schwarz and co-hosts, The University of Rhode Island and The Boeing Company, cordially invite you to attend and participate in this annual event.

Hosted by

Co-Hosted by

Technical Co-Sponsors

Media Sponsors

Why You Should Attend AMTA 2020

The AMTA is a non-profit, professional organization open to individuals with an interest in antenna, radar signature and other electromagnetic measurement technologies. AMTA’s areas of interest include measurement facilities, unique or innovative measurement techniques, test instrumentation and systems, radar cross section (RCS) measurements, compact-range design and evaluation, near-field techniques and their applications, and the practical aspects of measurement problems and their solutions. Exhibitors at the AMTA Symposia showcase antenna measurement related products and services including RF/microwave components, cables, antennas, test and measurement instrumentation, and software tools. AMTA members come from a variety of backgrounds including industry, government, and educational institutions, and are from locations around the world. For further details about the AMTA organization, please visit our web site at https://www.amta.org



  All Day

Monday 2-Nov-2020

Technical Sessions Available



Exhibits Open

Exhibit Hall


Meet, Greet and Reunite with your fellow AMTA colleagues



Live from the President - Welcome to AMTA



Keynote Speaker

Dr. Benoît Derat, Rohde & Schwarz GmbH & Co. KG

"Over-The-Air Testing Using Plane-Wave Synthesis: from Theory to Realization"



Live Q&A with Dr. Benoît Derat



Q&A with Session 1 Authors - Moderated by Session Chairs Teh-Hong Lee (The Ohio State University) and Justin Dobbins (Raytheon)



Q&A with Session 2 Authors - Moderated by Session Chairs Brian Fischer (Resonant Sciences) and Francesco D'Agostino (University of Salerno)


  All Day

Tuesday 3-Nov-2020

Technical Sessions Available



Exhibits Open

Exhibit Hall


Meet, Greet and Reunite with your fellow AMTA colleagues



EurAAP Invited Speaker

Prof. Giuseppe Vecchi, Politecnico di Torino

"Antenna Measurement beyond Nyquist"



Live Q&A Session with Prof. Giuseppe Vecchi



Q&A with Session 3 Authors - Moderated by Session Chairs David Tonn (University of Connecticut) and John Locke (Ford)



IEEE AP-S Invited Speaker

Prof. Mahta Moghaddam, University of Southern California

"Role of Accurate Near- and Far-Field Antenna Characterization in Imaging"



Live Q&A with Prof. Mahta Moghaddam



Q&A with Session 4 Authors - Moderated by Session Chairs Randy Jost (Ball Aerospace) and Kubilay Sertel (The Ohio State University)



Live Exhibitor Feedback Meeting (Exhibitors Only)


  All Day

Wednesday 4-Nov-2020

Technical Sessions Available



Exhibits Open

Exhibit Hall


Meet, Greet and Reunite with your fellow AMTA colleagues



Invited Speaker

Dr. Alan Fenn, MIT Lincoln Laboratory

"The MIT Lincoln Laboratory RF Systems Test Facility for Rapid Prototyping"



Live Q&A with Dr. Alan Fenn



Q&A with Session 5 Authors - Moderated by Session Chairs Amedeo Capozzoli (University of Naples Federico II) and Zhong Chen (ETS-Lindgren)



Invited Speaker

Dr. Goutam Chattopadhyay, NASA Jet Propulsion Laboratory

"Space Science and Instruments at NASA"



Live Q&A with Dr. Chattopadhyay



Q&A with Session 6 Authors - Moderated by Session Chairs Aubrey Beal (The University of Alabama at Huntsville) and Kenneth Allen (Georgia Tech Research Institute)



Annual Business Meeting / Meet and Greet the AMTA BoD and 2020 Host Committee



Thursday 5-Nov-2020

Short Course: Radome Theory, Design and Measurement Techniques
(Pre-recorded with live Q&A)



Final Networking Session and Closing Comments


Technical Sessions


"Three Antenna Polarization Measurement Revisited"

Ronald C. Wittmann and Michael H. Francis (Strativia, Inc.)


"Correction of the Measured Phase of the Radiation Pattern of Millimeter-Wave Antennas"

A. J. van den Biggelaar1, A. B. Smolders1, U. Johannsen1, B. F. Jamroz 2, and D. F. Williams2 (1Eindhoven University of Technology, 2National Institute of Standards and Technology)


"CATR Reflector Measurement System with Multiple Reflectors for Multiple Angles of Arrival in Millimeter Wave Frequency Bands"

Corbett Rowell, Adrian Cardalda-Garcia, and Benoît Derat (Rohde & Schwarz GmbH)


"Open Source Antenna Pattern Measurement System"

Christian W. Hearn, Dustin S. Birch, Daniel Newton, and Shelby L. Chatlin (Weber State University)


"Aircraft Antenna Placement Investigation Utilizing Measured Sources in Simulation Model"

Björn Möhring, Bernd Gabler, and Markus Limbach (Microwaves and Radar Institute (DLR))


"Reducing Phase-Measurement Errors Due to RF-Source Band Breaks"

John McKenna, Anh Le, and Scott T. McBride (NSI-MI Technologies)


"Single Antenna Dual Circularly-Polarized Chipless RFID Tag Reading Methodology"

Chao Liu, Katelyn Brinker, and Reza Zoughi (Iowa State University)


"Application and Improvement of Fast Antenna Characterization via Sparse Spherical Harmonic Expansion"

N. Mézières1, B. Fuchs1, L. Le Coq1, J.M. Lerat2, G. Le Fur3, and R. Contreres3 (1CNRS, 2LNE, 3CNES)


"A Low-cost and In-field Antenna Characterizing Method Based on Statistics Measurement"

Zhenyu Xu1, Thomas Mauldin1, Zheyi Yao1, Tao Wei1,and Kan Ren2 (1University of Rhode Island, 2Nanjing University of Science and Technology)


"Robot-Based Antenna and Radar Measurement System at the RWTH Aachen University"

R. Moch1 and D. Heberling1,2 (1RWTH Aachen University, 2Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR)


"Amplitude and Phase Uncertainty Analysis due to Cable Flexing in Robot-Based Measurement Systems"

R. Moch1, T. M. Gemmer1, and D. Heberling1,2 (1RWTH Aachen University, 2Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR)


"Antenna Measurement System Using Optical Fiber Link and Vertical Articulated Robot"

Satoru Kurokawa1, Michitaka Ameya1,and Masanobu Hirose2 (1National Institute of Advanced Industrial Science and Technology (AIST), 27G aa Co. Ltd)


"Evaluation of Integrated Antenna Performance through Combined Use of Measurements and Full-Wave Simulation"

Benoît Derat1, Mert Celik1, Sebastian Schmitz1, Winfried Simon2, and Andreas Lauer2 (1Rohde & Schwarz GmbH, 2IMST GmbH)


"Nearfield Antenna Measurements over Seawater – Challenges and Prospects"

David A. Tonn (Naval Undersea Warfare Center)


"Polyhedral Sampling Structures for Phaseless Spherical Near-Field Antenna Measurements"

Adrien Guth1, Cosme Culotta-López1, Johannes Maly2, Holger Rauhut2, and Dirk Heberling1,3 (1Institute for High Frequency Technology, RWTH Aachen University, 2Chair for Mathematics of Information Processing, RWTH Aachen University, 3Fraunhofer Institute for High Frequency Physics and Radar Techniques)


"Measuring G/T with a Spherical Near-Field Antenna Measurement System via the CW-Ambient Technique"

Ryan T. Cutshall, Justin Dobbins, and Matthew N. Barr (Raytheon Technologies)


"Reduced Azimuthal Sampling for Spherical Near-Field Measurements"

Fernando Rodríguez Varela, Xiaoliang Sun, Belén Galocha Iragüen, and Manuel Sierra Castañer (Universidad Politécnica de Madrid)


"Spherical Test-Zone Field Measurements of a Compact Antenna Test Range"

T. M. Gemmer1 and D. Heberling1,2 (1RWTH Aachen University, 2Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR)


"Near-field Testing with a 8.9x1.6 m2 Planar Scanner at Christiaan Huygens Laboratory (CHL)"

Cornelis G. M. van’t Klooster1 and Niels W. de Jong2 (1Eindhoven University of Technology, 2Christiaan Huygens Laboratory B.V.)


"Definition, Implementation, and Evaluation of a Novel Spiral-Sampling Technique"

Vivek H. Sanandiya and Scott T. McBride (NSI-MI Technologies)


"Nearfield Measurements on Integrated Antennas with a Frequency Convertor and Embedded Local Oscillator"

Thilo Bednorz and Mike Leffel (Rohde & Schwarz)


"Adaptive Sampling for Compressed Spherical Near-Field Measurements"

Cosme Culotta-López1, and Dirk Heberling1,2 (1RWTH Aachen University, 2Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR)


"Revising the Theory and Practice of Electrical Alignment Procedures for Spherical Near-field Antenna Measurement Facilities"

Kyriakos Kaslis, Olav Breinbjerg, Jeppe M. Bjørstorp, and Javier F. Alvarez (Technical University of Denmark)


"Sensitivity analysis of Fast Non-Redundant NF Sampling Methodologies with Probe Positioning errors"

M.A.Saporetti1, F. Saccardi1, L.J. Foged1, F. D’Agostino2, F. Ferrara2, C. Gennarelli2, R. Guerriero2, and D. Trenta3 (1Microwave Vision Italy (MVI), 2Università di Salerno, 3European Space Agency)


"NF-FF Transformation with Uniform Planar Spiral Scanning for Volumetric Antennas"

F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi, and G. Riccio (Università di Salerno)


"Near Field Measurements with Radically reduced Sampling requirement through Numerically defined expansion Functions"

M.A.Saporetti1, F. Saccardi1, L.J. Foged1, M. Righero2, G. Giordanengo2, G. Vecchi3, and D. Trenta4 (1Microwave Vision Italy (MVI), 2Links Foundation, 3Politecnico di Torino, 4European Space Agency)


"An Approach for Dimensioning Equivalent Radiators"

Amedeo Capozzoli, Claudio Curcio, and Angelo Liseno (Università di Napoli)


"Analysis and Characterization of Tapered Chambers"

Anoop Adhyapak, Zhong Chen, and Garth D’Abreu (ETS-Lindgren)


"Application of Kernel Density Estimation to Achieve Automated Near Real-Time Antenna Pattern Data Processing and Analysis in an Anechoic Chamber"

Emily Mendoza1 and Shea Watson2 (1Benefield Anechoic Facility (BAF), 2Air Force Research Laboratory (AFRL))


"Geometry- and Angle-dependent Monostatic Scattering of Microwave Absorbers"

Willi Hofmann, Andreas Schwind, Christian Bornkessel, and Matthias A. Hein (Technische Universität Ilmenau)


"Additive Manufactured 3:1 Bandwidth Dual-Polarized Range Antenna"

Jeffrey Fordham1, Edwin Barry1, Ricky Burge1, Michael Hollenbeck2, and Robert Smith2 (1NSI-MI Technologies, 2Optisys, LLC)


"Numerical Analysis of Techniques to Improve Oblique Incidence of Absorber"

Vince Rodriguez (NSI-MI Technologies)


"Numerical Study of the RCS of Pyramidal Absorber Geometries"

Vince Rodriguez1 and Zhong Chen2 (1NSI-MI Technologies, 2ETS-Lindgren)


"Mitigation Techniques for the Concealment of a New Fire Suppression Network and HVAC System Within a Pre-Existing Large Anechoic Chamber"

G. Brzezina, J. Smithson, K. Oueng, U. Hashmi, and A. Momciu (Canadian Space Agency)


"The Cost of Accuracy - Mechanical Systems"

Marion Baggett (NSI-MI Technologies)


"Increasing the Material Diversity in the Austin RCS Benchmark Suite Using Thin Plates"

Jon T. Kelley1, Ali E. Yilmaz1, David A. Chamulak2, and Clifton C. Courtney2 (1The University of Texas at Austin, 2Lockheed Martin Aeronautics Company)


"Examination of EMC Chamber Qualification Methodology for Applications Above 1 GHz Using Frequency Domain Mode Filtering"

Zhong Chen1 and Stuart Gregson2 (1ETS-Lindgren, 2Next Phase Measurements)


"Loadbox Design for EMC Testing in Automotive GNSS/SDARS Application"

Ali Attaran, Adam Weiss, Ronald Missier, John Locke, and Thomas Hermann (Ford Motor Company)


"Balun Design for CISPR 16-1-5 Calibration and Reference Test Site Verification"

James S. McLean (TDK R&D Corp)


"Microwave Material Characterization Using Epsilon Near Zero (ENZ) Tunnel Structures"

D.V.B. Murthy and C.J. Reddy (Altair Engineering, Inc.)


"SOLR Calibration Using Planar Offset Short in Free-space Material Measurement"

Jin-Seob Kang (Univ Korea Research Institute of Standards and Science (KRISS))


"A Genetic Algorithm Approach for Deriving Direction Finding Antenna Placement on Platforms"

Eric B. Dano (BAE Systems Inc)


"Multi-Layered Flat Metamaterial Lenses: Design, Prototyping and Measurements"

Anastasios Papathanasopoulos, and Yahya Rahmat-Samii (University of California Los Angeles)


"Textile-Based Corrugated-X Resonators for Wireless RF Power Transfer for Wearable Applications"

Dieff Vital, John L. Volakis, and Shubhendu Bhardwaj (Florida International University)


"Coupling Analysis of Antennas on Electrically Large Structures Using Equivalent Source Method"

D.V.B. Murthy and C.J. Reddy (Altair Engineering, Inc.)


"Combining Measurements and Simulations for Antenna Coupling Analysis"

L.J. Foged, L. Scialacqua, A. Giacomini, F. Saccardi, and F. Mioc (Microwave Vision Italy)


"Element Failure Detection of Antenna Array using Far-field Measurement with Shallow Neural Network"

Michitaka Ameya (National Institute of Advanced Industrial Science and Technology (AIST))


"RFID in Packaging Surveillance: Impact of Simulation Tools in Design, Coverage Planning and Placement of “Smart” Readers Along the Supply Chain"

Saranraj Karuppuswami and C.J. Reddy (Altair Engineering, Inc.)


"Utilization of Microwave Imaging for Chipless RFID Tag Reading and Verification"

Katelyn Brinker and Reza Zoughi (Iowa State University)


"Wideband Double-Ridged TEM Horn for Nondestructive Evaluation and Imaging Applications"

C. Liu, M.T. Al Qaseer, and Reza Zoughi (Iowa State University


"Compact Implantable Antenna Integrated with a Wireless Power"

Jaehoon Kim (Altair Engineering Inc.)


"Unifying G/T and Noise Figure Metrics for Receiver Systems"

Roy C. Monzello


"The Relationship Between Cartesian Multipoles and Spherical Wavefunction Expansions with Application to Wireless Power Transfer"

James S. McLean and Heinrich Foltz (TDK R&D Corp)


"A Validated Model for Non-Line-of-Sight V2X Communications"

T. Kleinow1, S. Lakshmanan1, P. Richardson1, V. Elangovan1, S. Schmidt2, J. Locke2, and M. Crowder2 (1University of Michigan-Dearborn, 2Ford Motor Company)


"Aerosol Jet printed Antenna for Vehicular Communications"

Adamantia Chletsou1, Cameron Crump1, John Papapolymerou1, and John F. Locke2 (1Michigan State University, 2Ford Motor Company)


"Increasing 4-D Imaging Radar Calibration Accuracy Using Compact Antenna Test Range"

Benoît Derat1, Daniel Markert1, Josef Schmöller1, Rong Cheng Leng1, Yaohui Liu2, and Ralf Reuter2 (1Rohde & Schwarz GmbH, 2Uhnder Inc.)


"Automotive Radar Simulations in a Real Traffic Scenario: Antenna Design and Radar Evaluation"

Jaehoon Kim (Altair Engineering, Inc.)


"Experimental Investigation of Different Floor Materials in Automotive Near Field Antenna Testing"

F. Saccardi1, F. Mioc1, A. Scannavini1, L. J. Foged1, J. Estrada2, P. O. Iversen2, M. Edgerton3, and J.A. Graham3 (1Microwave Vision Italy, 2MVG, Inc, 3GM Proving Grounds)


"Using High-Accuracy Swing Arm Gantry Positioners in Spherical Near-Field Automotive Measurement Systems"

Vivek Sanandiya, Tim Schwartz, and Eric Kim (NSI-MI Technologies)


"Bi-static Reflectivity Measurements of Vulnerable Road Users using Scaled Radar Objects"

Andreas Schwind, Willi Hofmann, Ralf Stephan, and Matthias A. Hein (Technische Universität Ilmenau)


"DNG MTM Loaded Planar Gasket Monopole Antennas for Automotive Applications"

Deepanshu Kaushal and Anuradha Sonker (NIT Hamirpur)


"Numerical Modelling and Experimental Validation of a D-Band Lens-Based Antenna Design for Beyond 5G Communications"

Benoît Derat1, Sebastian Schmitz 1, Simon Lachner1, Maria Arias Campo2, and Simona Bruni2 (1Rohde & Schwarz GmbH, 2IMST GmbH)


"Examining and Optimizing Compact Antenna Test Ranges for 5GNR OTA Massive MIMO Multi-User Test Applications"

S.F. Gregson1,2 and C.G. Parini2 (1Next Phase Measurements, 2Queen Mary University of London)


"Ultra-Reconfigurable VO2-Based Reflectarrays for 5G Applications"

Randy Matos and Nezih Pala (Florida International University)


"Automotive OTA Measurement Techniques and Challenges"

Patrick Pelland1, Daniël Janse van Rensburg1, Mihai Berbeci2, Fynn Ove Storjohann3, Andreas Griesche3, and Jan-Peter Busch3 (1NSI-MI Technologies, 2NSI-MI UK Ltd., 3Antenna Technology Center GmbH)


"Challenges for the Automotive Industry on MIMO OTA Testing"

Mihai Berbeci1, Patrick Pelland2, Thomas Leifert3 (1NSI-MI UK Ltd., 2NSI-MI Technologies, 3Keysight Technologies)

AMTA 2020 Board of Directors

President Jeffrey Bean president@amta.org
Vice President Ed Urbanik vice-president@amta.org
Treasurer Stuart Gregson treasurer@amta.org
Meeting Coordinator Michelle Taylor meeting-coordinator@amta.org
Technical Coordinator C.J. Reddy technical-coordinator@amta.org
Secretary Zhong Chen secretary@amta.org
AMTA 2020 Host Joe Mallon host@amta.org

AMTA 2020 Host Committee

Host Chair Joe Mallon, Rohde & Schwarz host@amta.org
Vice-Chair Dennis Lewis, The Boeing Company vice-chair@amta.org
Treasurer John Estrada, MVG hosttreasurer@amta.org
Audio/Visual Coordinator Jeff Guerrieri, NIST avcoordinator@amta.org
Exhibits Coordinator Michelle Taylor, NSI-MI Technologies exhibits@amta.org
Social Program Coordinator James Young, ETS-Lindgren events@amta.org
Marketing Coordinator Janet O'Neil, ETS-Lindgren marketing@amta.org
Student Day Coordinator Dr. Rick Vaccaro, University of Rhode Island studentday@amta.org
Short Course Coordinator Lydell Frasch, The Boeing Company (Retired) shortcourse@amta.org
Technical Program Liaison Wally Arcineaux, Rohde & Schwarz tech-liaison@amta.org

Meet the Featured Speakers


Benoît Derat, PhD

Rohde & Schwarz GmbH & Co. KG

”Over-The-Air Testing Using Plane-Wave Synthesis: from Theory to Realization”

Abstract & Bio

Near-field focusing techniques for antenna measurements started to develop in the late 50s. Plane-wave synthesis (PWS), which is utilizing a phased antenna array to generate a close to planar wavefront in a target region, belongs to this category of techniques. PWS presents two major features, giving it a unique benefit: (i) it allows a true emulation of a far-field condition, as perceived from the device under test (DUT); (ii) it reduces the necessary range length by a factor of 2 or more compared to a compact antenna test range (CATR) with similar quiet zone performance. With these advantages in mind, our group set out to create the first turnkey solution implementing this method, the R&S PWC200, with a specific focus on 3GPP over-the-air (OTA) conformance testing of 5GNR active antenna system (AAS) base stations (BS). Barriers were however much higher than expected and multiple inventive steps were required to turn this attractive concept into an accurate measurement system. This keynote retraces our bumpy engineering path, with a highlight on the main technical and scientific challenges (array calibration, phase shifter imperfections, high power handling, broadband frequency dispersion, etc…) and novel solutions which finally enabled the technology to an adequate level.


Dr. Benoît Derat started his career at SAGEM Mobiles as an antenna design and electromagnetics research engineer. During these years, he gained expertise in antenna measurements and simulations, and actively contributed to innovation and international standardization in near-field techniques for human exposure assessment to radiofrequency waves. In 2009, he founded the company ART-Fi which created the first vector-array SAR measurement system and initiated the IEC 62209-3 standard development. Dr. Derat operated as the CEO and President of ART-Fi until 2017, before joining Rohde & Schwarz at the Munich headquarters. He is now leading the R&D for EMC, OTA, antenna and A&D test systems, as Senior Director of Engineering. Dr. Derat is the author of more than 70 scientific conference and journal papers, as well as an inventor on multiple patents relating to antenna and electromagnetic field measurements.


Giuseppe Vecchi

Politecnico di Torino, Italy

“Antenna Measurement beyond Nyquist”

Abstract & Bio

Antenna measurement is based on acquiring field samples according to well-known “Nyquist-like” sampling density criteria. In NF-FF systems, research has been done, and is still actively pursued, on optimizing the number of necessary NF samples, typically with non-uniform sampling schemes. Overall measurement time optimization may be somewhat trickier, as it also depends on the specific mechanical properties of the probe movement system. This research is intended to reach as close as possible to the ideal “Nyquist” limit. Going beyond this limit is not unphysical, though: it however requires to insert a-priori information into the algorithm that computes the radiated FF starting from the NF samples. Effective ways to achieve undersampling will be the main topic of this talk. The approach has multiple application areas: drastic speedup of the measurement time for accurate characterization of antennas, both self-standing and mounted on platforms; verification of complex platforms where only a limited number of field samples can be obtained; verification of compliance for rapid testing (e.g. in-line). The key ingredient is a meaningful way of exploiting whatever available a-priori information on the AUT into the NF-FF process. The process is two-phase: a model-building phase, and a phase, based on the available measurement, in which the model is matched to measured data to provide the field everywhere (both in NF and FF regions). The first way to provide information is through knowledge of the geometrical structure of the AUT; this allows to carry out partial or full simulation of the AUT, prior to physical measurement; this gives rise to an important class of algorithms. Uncertainties in the knowledge of the AUT can be accommodated, at the expense of more computation. The technique can be applied both to precise measurements and to “sniff” testing, i.e. verification of compliance with very reduced sampling. Other ways of providing information are relevant to fast testing. In a series production, information may be in the form of measurements of a certain number of sample AUT, or even in the form of the requirement mask alone. The talk will also touch upon NF-FF on non-canonical grids, which is useful in some embodiments of the technique.


Giuseppe Vecchi received the Laurea and Ph.D. (Dottorato di Ricerca) degrees in electronic engineering from the Politecnico di Torino, Torino, Italy, in 1985 and 1989, respectively, with doctoral research carried out partly at Polytechnic University (Farmingdale, NY). He was a Visiting Scientist with Polytechnic University in 1989-1990. Since 1990 he is with the Department of Electronics, Politecnico di Torino, where he has been Assistant Professor, Associate Professor (1992 – 2000), and Professor. He was a Visiting Scientist at the University of Helsinki, Helsinki, Finland, in 1992, and has been an Adjunct Faculty in the Department of Electrical and Computer Engineering, University of Illinois at Chicago, 1997-2011. Since 2015 he serves as the Director of the Antenna and EMC Lab (LACE) at Politecnico. He has been an Associate Editor of the IEEE Transactions on Antennas and Propagation, Chairman of the IEEE AP/MTT/ED Italian joint Chapter, and member of the IEEE-APS Educational Committee. Prof. Vecchi is a Fellow of the IEEE, a member of the Board of the European School of Antennas (ESOA), and a member of the IEEE Antennas and Propagation Standard Committee. His main professional experience and research activities concern analytical and numerical techniques for antennas analysis, design, measurement, and diagnostics.


Mahta Moghaddam

University of Southern California

“Role of Accurate Near- and Far-Field Antenna Characterization in Imaging”

Abstract & Bio

It would be a trivial statement to say that we use antennas of all sorts to transmit and receive microwaves for imaging application. It is far from trivial, however, to characterize and account for the transmit/receive properties of these antennas in support of quantitative image formation, whether the antennas are in the far field – such as in remote sensing and radar applications – or in the near field – such as in medical imaging and nondestructive testing applications. This talk will cover some of our work on both remote and proximal microwave sensing, which, respectively, require detailed considerations of far-field and near-field antenna properties. In radar remote sensing, our goal is to quantitatively retrieve environmental variables, such as vegetation and soil characteristics, from a small number of polarimetric observations. The retrieval process is often formulated as an optimization problem in which the rather complex electromagnetics scattering models are simplified and parameterized in terms of a small number of unknown, allowing the estimation of the unknown geophysical variables via local or global iterative solutions. More recently, learning-based methods have also been proposed for the retrieval process. In medical imaging and nondestructive testing applications, our goal is to reconstruct the full 3D dielectric properties of the object domain. This is typically done by formulating the problem as a nonlinear inverse scattering problem, solving it by iterations on forward scattering models and/or by combinations of EM-based scattering and learning-based approaches. In both classes of problems, the success of the imaging and inverse scattering solutions hinges on the accurate knowledge of the scattered field or the scattering cross section, which in turn requires finesse in characterizing the transmit and receive behavior of the antennas and their interactions with their immediate environment. We will present examples of scenarios for both radar remote sending and medical imaging applications and the methods we have investigated to account for antenna behavior as an integral part of the imaging system.


Prof. Mahta Moghaddam is the Ming Hsieh Chair in Electrical and Computer Engineering, Director of New Research Initiative at the Viterbi School of Engineering, Co-Director of the Center for Sustainability Solutions, and Distinguished Professor at the University of Southern California, Los Angeles, CA. Prior to that she was at the University of Michigan (2003-2011) and NASA Jet Propulsion Laboratory (JPL, 1991-2003). She received the B.S. degree in 1986 from the University of Kansas, Lawrence, Kansas with highest distinction, and the M.S. and Ph.D. degrees in 1989 and 1991, respectively, from the University of Illinois at Urbana-Champaign, all in Electrical and Computer Engineering. She has introduced new approaches for quantitative interpretation of multichannel radar imagery based on analytical inverse scattering techniques applied to complex and random media. She was a Systems Engineer for the Cassini Radar and served as Science Chair of the JPL Team X (Advanced Mission Studies Team). Her most recent research interests include the development of new radar instrument and measurement technologies for subsurface and subcanopy characterization, development of forward and inverse scattering techniques for layered random media especially for root-zone soil moisture and permafrost applications, geophysical retrievals using signal-of-opportunity reflectometry, and transforming concepts of radar remote sensing to medical imaging and therapy systems. Dr. Moghaddam is a member of the NASA Soil Moisture Active and Passive (SMAP) mission Science Team and a member of the NASA Cyclones Global Navigation Satellite System (CYGNSS) Science Team. She was the principal investigator of the AirMOSS NASA Earth Ventures 1 mission. She served as the IEEE Antennas and Propagation Magazine from 2015 to 2019 and is currently President of the IEEE Antennas and Propagation Society. Dr. Moghaddam is a member of the National Academy of Engineering.


Dr. Alan J. Fenn

MIT Lincoln Laboratory

“The MIT Lincoln Laboratory RF Systems Test Facility for Rapid Prototyping”

Abstract & Bio

The MIT Lincoln Laboratory RF Systems Test Facility (RFSTF) is a research and development rapid prototyping facility with resources to design, fabricate, and measure antennas, radar targets, and electromagnetic systems for surface, airborne, and space applications. The RFSTF is comprised of six anechoic chambers, a systems-integration lab (SIL), high-bay staging area / rapid prototype shop, and RF laboratory. The RFSTF is co-located with the MIT Lincoln Laboratory Flight Test Facility, which allows rapid integration of RF sensors with airborne platforms. The six shielded anechoic chambers (tapered, millimeter-wave, small near-field scanner, system-test, compact range, and large near-field scanner) allow for antenna, radar-cross section (RCS), and electromagnetic system measurements over a wide frequency range. The three large system-test, compact range, and planar near-field chambers can accommodate large, heavy, test articles, making use of an overhead crane (system-test chamber), rolling gantry with crane (compact range chamber), and reconfigurable rolling cart (large near-field scanner). The system test rectangular chamber provides far-field and spherical near-field scanning capability up to 20 GHz. Antenna and RCS measurements are performed in the compact range from UHF up to 100 GHz with a blended rolled-edge reflector. The large near-field scanner chamber is configured to calibrate and measure gain radiation patterns of large phased array antennas up to 50 GHz. In the tapered chamber, a dual-polarized ultrawideband feed allows measurements from about 250 MHz up to 3 GHz, and higher frequencies. The rectangular millimeter wave chamber operates from about 4 GHz to 100 GHz. The small near-field scanner chamber is used primarily for calibrating and testing small phased array antenna panels up to 26 GHz. The rapid prototyping shop has a wide variety of machining tools and 3D printers to fabricate antennas, target-mounting fixtures, and other mechanical pieces necessary to aid and assist in any testing in the facility. The shop also has a high-bay area with overhead crane, allowing for a wide range of mechanical work to be performed on larger devices and systems. The RF Laboratory is a general-purpose area that can be configured to support the needs of many different projects. Example RFSTF measurements of phased arrays and other antennas are described.


Dr. Alan J. Fenn is a Senior Staff Member in the RF Technology Group in the Advanced Technology Division at MIT Lincoln Laboratory. He is currently involved in the development of ultrawideband antennas and arrays for radar and communications applications. He joined Lincoln Laboratory in 1981 and from 1982 to 1991 was a member of the Space Radar Technology Group, where his primary research was in adaptive phased-array antenna development. From 1992 to 1999, he was Assistant Leader in the RF Technology Group, managing programs involving measurements of atmospheric effects on satellite communications. In 2000, he was elected a Fellow of the IEEE for his contributions to the theory and practice of adaptive phased-array antennas. He served as Technical Program Chair for the 2018 IEEE International Symposium on Antennas and Propagation He served as Technical Program Chair for the 2019 IEEE International Symposium on Phased Array Systems and Technology. He is an author of 5 books and numerous journal articles and conference papers on the subject of adaptive antennas and phased arrays. He received a B.S. degree from the University of Illinois–Chicago and M.S. and Ph.D. degrees from The Ohio State University, all in electrical engineering.


Goutam Chattopadhyay

NASA-Jet Propulsion Laboratory, California Institute of Technology

“Space Science and Instruments at NASA”

Abstract & Bio

NASA’s Jet Propulsion Laboratory, which completed eighty years of its existence in 2016, builds instruments for NASA missions. Exploring the universe and our own planet Earth from space has been the mission of NASA. Robotics missions such as Voyager, which continues to go beyond our solar system, missions to Mars and other planets, exploring the stars and galaxies for astrophysics missions, exploring and answering the question, “are we alone in this universe?” has been the driving force for NASA scientists for more than six decades. Fundamental science questions drives the selection of NASA missions. We develop instruments to make measurements that can answer those science questions. In this presentation, we will present an overview of the state of the art instruments that we are currently developing and layout the details of the science questions they will try to answer. Rapid progress in multiple fronts, such as commercial software for component and device modeling, low-loss circuits and interconnect technologies, cell phone technologies, and submicron scale lithographic techniques are making it possible for us to design and develop smart, low-power yet very powerful instruments that can even fit-in a SmallSat or CubeSat. We will also discuss the challenges of the future generation instruments in addressing the needs for critical scientific applications. The research described herein was carried out at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA, under contract with National Aeronautics and Space Administration.


Goutam Chattopadhyay is a Senior Research Scientist at the NASA’s Jet Propulsion Laboratory, California Institute of Technology, a Visiting Associate at the Division of Physics, Mathematics, and Astronomy at the California Institute of Technology, Pasadena, USA. He received the Ph.D. degree in electrical engineering from the California Institute of Technology (Caltech), Pasadena, in 2000. He is a Fellow of IEEE (USA) and IETE (India) and an IEEE Distinguished Lecturer. His research interests include microwave, millimeter-wave, and terahertz receiver systems and radars, and development of space instruments for the search for life beyond Earth. He has more than 350 publications in international journals and conferences and holds more than fifteen patents. He also received more than 35 NASA technical achievement and new technology invention awards. He received the IEEE Region 6 Engineer of the Year Award in 2018, Distinguished Alumni Award from the Indian Institute of Engineering Science and Technology (IIEST), India in 2017. He was the recipient of the best journal paper award in 2020 and 2013 by IEEE Transactions on Terahertz Science and Technology, best paper award for antenna design and applications at the European Antennas and Propagation conference (EuCAP) in 2017, and IETE Prof. S. N. Mitra Memorial Award in 2014.

Frequently Asked Questions


Please click here to learn about the Agenda
November 2, 2020 beginning at 8:00 am (EST). Your registration provides access to the Lobby, Exhibit Hall, Networking Lounge, Auditorium to view all presentations until November 5, 2020 5:00 pm (EST).
Our Registration Bags this year will be replaced with Digital Grab Bags providing digital giveaways, white papers, application notes, brochures, access to webinars and more from our Exhibitors and Sponsors. For AMTA members, a digital copy of the Proceedings will be available to download at www.amta.org after the conference.


Yes, you will need to register here
The registration fee includes membership for 1 year. Click herefor more about AMTA.
No, we are not offering group discounts to this event.
No, we are not offering registration transfers for this event.


vFairs platform is compatible with all browsers except Internet Explorer (Google chrome is the recommended browser to use this platform)
Your e-mail provided during registration will give you access to the conference.
Please email at amta2020@getvfairs.io for any technical questions.


Please click here to see who is Exhibiting.
Please contact Michelle Taylor, 2020 Exhibits Chair, at Exhibits@amta.org


Please contact Joe Mallon, AMTA 2020 Host Chair at host@amta.org