5G Design, Test, and Measurement Challenges

Date: Tuesday July 10
Time: 2:00 – 6:30
Room: Bayshore West

Time Speaker Affiliation Talk Title
2:00 Larry Williams Ansys Inc. 5G Design Innovation Through Simulation
2:40 Michael Foegelle ETS-Lindgren 5G and Millimeter Wave Device Measurement Challenges
3:20 Andjela Ilic-Savoia Keysight Technologies Exploring Spatial Reuse and Beam Management from T&M Perspective
Coffee Break
4:30 Chen Chang National Instrument A Platform Approach to 5G Test Challenges
5:00 Clarke Ryan Spirent Communications Testing 5G: Working to Make Ends Meet
5:30 Paul Dixon Laird EMI Mitigation for 5G
6:00 Mihai Banu Blue Danube Systems Phased Array Based Massive MIMO Systems for sub-6 GHz Bands: Benefits and Challenges


Dr. Larry Williams, Director of Technology, ANSYS Inc.

Dr. Larry Williams is Director of Technology at ANSYS Inc. He is responsible for the strategic direction of the company’s physics simulation products. Dr. Williams is an expert in the application of electromagnetic field simulation to the design of antennas, electromagnetic devices, and high-speed electronics. He has over 20 years’ experience in the fields of electromagnetics and communications engineering, has delivered technical lectures internationally, and has published numerous technical papers on the subject. He and his co-authors won the prestigious H.A. Wheeler Prize Paper Award in the IEEE Transactions on Antennas and Propagation, 1995, and the best paper award at DesignCon 2005. He serves on the UC Irvine Henry Samueli School of Engineering Dean’s Leadership Council and on the California State Polytechnic University Electrical Engineering Department Advisory Board.
Dr. Williams held various senior engineering positions in the Engineering Division of Hughes Aircraft Company, Radar Systems Group, where he was responsible for hardware design and development of advanced active phased array radar antennas, array element and aperture design, associated microwave subsystems, and antenna metrology.

He received his Masters, Engineers, and Ph.D. degrees from UCLA in 1989, 1993 and 1995, respectively.

Dr. Michael D. Foegelle, Directory of Technology Development, ETS-Lindgren

Michael D. Foegelle is the Director of Technology Development at ETS-Lindgren in Cedar Park, Texas, and has more than 20 years of test and measurement experience in RF and wireless. He received his Ph.D. in physics from the University of Texas at Austin.  Dr. Foegelle has been actively involved in standards development on the American National Standards Institute (ANSI) Accredited Standards Committee C63 on electromagnetic compatibility, CTIA Certification Program Working Group, Wi-Fi Alliance, WiMAX Forum, IEEE 802.11, and 3GPP. He has served as chair or vice-chair of various working groups in those organizations and currently co-chairs the joint CTIA/Wi-Fi Alliance Converged Wireless Group and the CTIA OTA Measurement Uncertainty Subgroup.  He has authored or co-authored numerous papers in the areas of Electromagnetics, EMC, Wireless Performance Testing, and Condensed Matter Physics, holds several patents on wireless and electromagnetic test methods and equipment, and is dedicated to advancing the state of the art in radiated RF testing of emerging wireless technologies.

Andjela Ilic-Savoia, Applications Engineer – Wireless Expert, Keysight Technologies

Andjela Ilic-Savoia is a Wireless Expert/Solutions architect at Keysight Technologies. In this role, she represents the company as technical expert in marketing efforts, at conferences and workshops, and supports Sales of Keysight Wireless Test and Measurement Solutions in the Americas.

Andjela has a diverse background ranging from R&D positions in small companies, to customer-facing positions in large organizations such as Keysight. In the 10 years of her carrier, she has been working on leading-edge wireless test solutions, addressing challenges for the test, deployment, optimization and interoperability of wireless/cellular networks.
She obtained her Masters’ Degree in Electrical Engineering at the University of Belgrade, Serbia, and a second Masters’ in Electrical/Computer Engineering at the University of Delaware, USA.

Dr. Chen Chang, Strategic Business Development Director, National Instruments

Dr. Chang is the Strategic Business Development Director at National Instruments, responsible for long-term innovation explorations and strategic customers/partners relations.  Dr. Chang was the co-founder and Chief Executive Officer at BEEcube Inc., which was acquired by National Instruments in February 2015.  Dr. Chang is an expert in 5G wireless technology and test solutions.  He is regularly consulted by companies to provide guidance for their advanced, high performance wireless architectures.  He was the Chief Architect of the Berkeley Emulation Engine (BEE) project at the University of California, Berkeley, leading the design and implementation of three generations of the FPGA-based emulation and computing system, as well as a unified FPGA/ASIC design environment using high-level descriptions.  Dr. Chang holds B.Sc., M.Sc. and Ph.D. degrees in Electrical Engineering and Computer Science from the University of California, Berkeley.

Paul Dixon, Staff Scientist, Advanced R&D, Laird

Paul Dixon is a Staff Scientist in the Advanced R&D group at Laird. Paul’s current responsibilities include leading the advanced electromagnetic modeling team to characterize absorber and EMI performance in complex situations. Paul began with Emerson & Cuming in 1986. Primary responsibilities included microwave absorber and anechoic chamber design and test. In 1992 Paul formed Microsorb Technologies which designed and manufactured microwave absorbers.  In 1996, Paul returned to E&C as Technical Director with the responsibility of driving new material technology including absorbers, dielectrics and RFID isolator material. Paul’s educational background includes a BS degree in Astrophysics from Michigan State University in 1982 and an MSEE degree in Microwave Engineering from the University of Massachusetts-Amherst in 1986.

Clarke Ryan, Senior Director, Product Development, Spirent Communications

Clarke Ryan is a senior director of product development for the Connected Devices business unit at Spirent Communications. He has over twenty-five years of engineering, business development and operations experience across several telecommunications companies serving key carriers around the globe. His expertise includes wireless access infrastructure, VoIP core network products, carrier aggregation, and test methodologies for measuring mobile location, video, audio, and data performance.

Clarke graduated from Columbia University with a Bachelor’s and Master’s degree in Electrical Engineering.

Mihai Banu, Founder, Chief Technology Officer, and Board of Directors, Blue Danube Systems

Dr. Banu has over 30 years of experience in circuits and systems R&D, with emphasis on analog, radio frequency and mixed-signal integrated circuits. His experience encompasses many areas from invention and demonstration of new circuits and system concepts, to design methodologies and product development.

Dr. Banu is Founder of Blue Danube Systems, which received Series A venture capital funding and started operations in 2013. He developed the Blue Danube Systems technology concepts at MHI Consulting, a small consulting firm founded and owned by Dr. Banu since 2006. Prior to that, he was R&D director at Agere Systems, working on analog circuits, RF systems for wireless LANs and wireless circuits research. From 1995 to 2000, Dr. Banu was Head of the Communications Circuits Research department at Lucent Technologies, where he was responsible for advanced work in circuit design and Si technology process-device enhancements including SiGe BiCMOS. From 1980 to 1995, he was a Member of Technical Staff at AT&T Bell Laboratories in the Communications Sciences Division, the Physical Sciences Division and the VLSI Research Department.

Dr. Banu is author of more than 30 technical papers, several book chapters and many U.S. and international patents. As a recognized IC design expert, he was invited to contribute in many panels and workshops at major international conferences, as well as teach short courses. He received his bachelor’s, master’s, and Ph.D. degrees in electrical engineering from Columbia University and he is an IEEE Fellow.


5G Design Innovation Through Simulation: Modern electromagnetic simulation is founded on the vision that all electronic design is fundamentally based on Maxwell’s Equations, thus solving them directly would one day become the basis for the highest performance design. That day is today.
In this forward-looking presentation, Dr. Williams will show how engineers deliver design innovation for 5G systems using advanced physics-based simulation. You will see that superior design can be delivered using advanced engineering simulation and high-performance computing leading to advantage for both large corporations and small start-ups.
Industry examples from 5G applications will be highlighted. An active phased array antenna system for real-time beamforming and high-bandwidth communications will be shown using multi-scale and multi-domain simulation. It will be shown that modern electromagnetic field solvers can combine with circuits and systems for base station antenna system modeling.
Topics in RFIC module design for sub-6GHz applications will be described, and layout-based design assembly will be covered to illustrate how a combination of multi-die laminate structures can be designed. Dr. Williams will also revisit a recent NXP presentation showing how they utilized a multiphysics design flow for large-signal RF Power devices allowing them to create a device model for RF circuit simulation but also to identify temperature distribution across wirebonds.
5G systems require significant signal processing and data center switching resulting in new challenges in chip, package, printed circuit board integration. Examples will be shown where electrical signal integrity, power integrity, thermal behavior, and EMI can be addressed.
Applications of 5G for future Autonomous vehicles and smart cities will also be explored illustrating challenges and opportunities. The presentation concludes with Dr. Williams’ vision on what the future will bring and how it will impact organizations that embrace it.

5G and Millimeter Wave Device Measurement Challenges: Emerging 5G radio access technologies will drastically change the landscape of not only the cellular communication ecosystem as a whole, but more specifically the way in which radios are tested.  In the search for more data bandwidth, the 5G new radio (NR) will push into new frequency ranges traditionally reserved for satellite and defense applications.  The associated adaptive antenna system (AAS) technologies required to accomplish this and increase overall spectral efficiency, namely beamforming and massive MIMO, will have a dramatic impact on the testing of the associated radios.  Where traditionally most of the radio functionality could be evaluated independent of the antenna system, the use of AAS makes it impossible to dissociate the radio performance from the antenna performance.  The antenna arrays used with these radios make the prospect of performing a conducted test at each antenna port impractical if not impossible.  Thus, even the most basic radio performance or functional metric must be performed in an over-the-air test environment.  The impact of these changes extend beyond radio design testing to both production line and electromagnetic compatibility, where the complexity of the radio and the need to test over-the-air not only complicates the tests, but increases the amount of testing required.  This presentation will provide and introduction to 5G NR and the implied requirements for the physical layer, and discuss the impact on various test cases.  It will also provide a brief update on the progress in 3GPP regarding testing the new radio.

Exploring Spatial Reuse and Beam Management from T&M perspective: 5G NR carries potential to dramatically expand the capacity of cellular communications through the existing domains of deployed spectrum, spectral efficiency and cell size, augmented by the new domains of spatial dimension and the “beam management”.

In addition, with lack of green space spectrum below 6GHz, we must shift our focus to mm Wave, where we have to consider non-conductive, over the air measurements, and where the two paradigms become crucial to understand and concur. In this presentation we will talk about cellular moving from a system specified and tested in the non-spatial (cabled) domain towards a fully radiated or “over the air” (OTA) domain. We will further explore the importance of spatial dimension/spatial reuse and the “beam management”, novel paradigms in commercial cellular communications, and how they are being addressed by standards and the Industry, from test and measurement(T&M) perspective.

A platform approach to 5G test challenges: 5G technologies have been rapidly evolving in the past years. Now that the first 5G NR specification has been approved by 3GPP, test & measurement challenges of high volume production have becoming a critical piece of the overall 5G eco-system. 5G brings higher bandwidth, lower latency, and ultra-reliable communication to the end users. However, to ensure proper functions of the vastly diverse new generation of products ranging from infrastructure equipment to end user devices, now is the time to rethink T&M architectures and measurement techniques that can truly economically scale to the volume demanded by 5G new applications. Wireless researchers have embraced a platform design approach using software defined radios (SDR) to expedite the early research phase of 5G, and they have delivered many ground-breaking results. In this presentation we will explore a similar platform-based approach to 5G test & measurement challenges in high-volume automated test environment.

EMI Mitigation for 5G: 5G systems need protection from electromagnetic interference just like other wireless systems.  EMI can increase noise in a system resulting in loss of sensitivity for key components.  Regulatory requirements also place limitations on unintentional emissions radiated from a device. Millimeter wave operation creates unique challenges for traditional shielding solutions.  Also, the need to control and dissipate thermal energy is the primary limitation facing 5G designers.  Effective thermal mitigation designs can act to exacerbate EMI emissions and interference in mmWave systems. This presentation will outline common high frequency shielding issues and thermal solutions and identify mitigation techniques and materials.  Solutions to common EMI and thermal issues in mmWave systems will be discussed.

Phased Array Based Massive MIMO Systems for sub-6 GHZ Bands: Benefits and Challenges: Many communication system experts are advocating Massive MIMO as the next generation RAN technology for 4G and 5G commercial deployment. In theory Massive MIMO offers better multi-user spatial multiplexing than conventional MIMO. However, the normal brute force implementation of Massive MIMO with a large number of radio chains, commonly referred to as “Digital” Massive MIMO suffers from excessive HW complexity/cost and performance degradation due to practical impairments such as transceiver non-linearities, calibration errors, channel estimation errors, pilot contamination and inter-cell interference. Alternatively building Massive MIMO on a phased array foundation, referred to here as Coherent Massive MIMO, yields more practical systems with less sensitivity to impairments. Like Digital Massive MIMO, conventional implementations of Coherent Massive MIMO arrays are expensive mainly due to precise RF phase/magnitude alignment requirements but recent developments by Blue Danube Systems have demonstrated low cost designs. These economical systems achieve sub 5 degree phase error and sub 1 dB magnitude error over field operating conditions. This talk will review the challenges of building low cost Coherent Massive MIMO arrays and resulting performance advantages.


Debabani Choudhury 

Intel Labs

Paul Khanna

National Instruments