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32nd International Union of Radio Science General Assembly & Scientific Symposium * Montreal, Canada * 19-27 August 2017 Home Page

Scientific Program - Commission E

Commission E Chair:
Dr. David Giri;

Commission E - Tutorial

William Radasky - "EMC Aspects in Smart Grids"

Convener: D. V. Giri

Smart Grids are being contemplated and portions of them implemented in some nations. This tutorial talk deals with the EMC aspects of the smart grids.

Commission E - "EMC in Complex Systems (1)"

Conveners: P. Degauque, F. Silva

The session addresses one of the central issues in electromagnetic compatibility and interference, namely the treatment of complexity. Complex systems consist of many interacting components participating to the EM interaction response. The complexity of a system increases with the number of distinct components, the sophistication of the components and their interactions. The scope of the session is to present work which focuses on modeling, simulation and experimental characterization of complex systems, the effects of ground on electromagnetic coupling phenomena and the coupling of electromagnetic waves through the structures.

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Commission E - "High-Power Electromagnetics"

Conveners: D. V. Giri, R. L. Gardner

The sessions address intentional electromagnetic interference (IEMI), or the intentional malicious generation of electromagnetic energy introducing noise or signals into electric and electronic systems, thus disrupting, confusing or damaging these systems for terrorist or criminal purposes. The technical area of HPE consists of the physics and engineering associated with electromagnetic sources where nonlinear effects associated with high-field regions (and air breakdown) must be included in the analysis and design. This includes EMP simulators, high-power narrowband and mesoband sources and antennas, and hyperband (impulse) sources and antennas.

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Commission E - "Intentional Electromagnetic Interference"

Conveners: M. Bäckstrom, W. Radasky, L. Shi

The sessions address intentional electromagnetic interference (IEMI), or the intentional malicious generation of electromagnetic energy introducing noise or signals into electric and electronic systems, thus disrupting, confusing or damaging these systems for terrorist or criminal purposes. This session will mainly deal with the impacts of IEMI on different types of equipment and systems including the means to protect against this threat.

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Commission E - "Stochastic/Statistical Techniques in EMC"

Conveners: L. Arnaut, S. Pignari

The EMC community is increasingly interested in the development of analysis and design techniques which take account of the inherent uncertainty of system parameters. In fact, the system response is affected by the statistics of such parameters, and varies widely within a distribution. Typical areas of interest include effects due to unknown wave parameters of interfering signals, statistical nature of fields inside metallic enclosures, uncertainty in the location of conductors inside multiwire structures and routing of bundles in metallic enclosures, values of termination impedances, values of stray parameters and material parameters, etc. The session will address these issues and give updated information on developments in EMC characterization and testing based on statistical analysis and design techniques.

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Commission E - "EMC in Wired and Wireless Systems"

Conveners: F. Rachidi, F. Gronwald, M. Haridim, J. Gavan

The session addresses the propagation of signals and interference in wired and wireless systems, with particular focus on ADSL and PLC.

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Commission E - "Lightning and Related Phenomena"

Conveners: V. Rakov, S. Yoshida

The session addresses the characterization of terrestrial and planetary electromagnetic noise, as well as natural noise from terrestrial and extra-terrestrial sources with a view towards the interests of CCIR and the advancement of knowledge.

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Commission E - "EMC for PCB and Package"

Conveners: C. Holloway, E. P. Li

Rapid growth and convergence of digital computing and wireless communication have resulted in complex EMC which cannot be easily addressed by conventional methods. This session will address the various techniques for modelling and simulation of EMC problems, such as Signal integrity/power integrity, numerical modelling of automotive EMC, aerospace EMC, integrated circuit EMC. In addition, the material property on electromagnetic performance, aging effects, thermal-electrical coupling.

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Commission E - "EMC of Power Electronics"

Conveners: Yu-Kang Lo, C. Vollaire

Advantages in semiconductor technology drive power electronics to higher efficiencies and compact systems designs. This progress comes along with increasing effort to comply with EMC requirements. Integration as a response to the market demands intensifies the challenges. With dense placement electromagnetic coupling between components raises influence on system behavior. The design becomes more complex and leads to significantly higher development costs. This session deals with the EMC in Power Electronics.

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Commission E - "EMC in Power Engineering"

Conveners: X. Cui, J. He

This session addresses the environmental effects of ac and dc power transmission systems, including electrical and magnetic fields, radio interference and the special ion current phenomena generated by dc transmission lines. The electromagnetic interferences on secondary systems in substations or converter stations are also included.

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Commission E - "Measurement Techniques"

Conveners: R. Serra, C. Lemoine

The session addresses the raft of techniques that are involved in making electromagnetic compatibility measurements. The wide variety of available measurement techniques and the ever-increasing challenges faced by development and test engineers makes the measurement and analysis of EMC phenomena a significant discipline. The scope of the session is to contribute with original research work spanning the whole spectrum of measurement techniques

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Commission E - "Geomagnetic Disturbances (GMD) and Effects"

Conveners: W. Radasky, E. Savage

A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or a cloud of magnetic field that interacts with the Earth's magnetic field. The increase in the solar wind pressure initially compresses the magnetosphere. The solar wind's magnetic field then interacts with the Earth's magnetic field and transfers charged particles into the lower ionosphere creating high levels of current flow which in turn causes fluctuating B-fields at the Earth's surface. These B-fields can induce significant currents into long conducting lines, such as power and communications lines, thereby affecting the operation of the related systems.

This session deals with GMDs and their effects on critical infrastructure components such as the power grid.

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Commission E - "New Concepts in Wireless Communications"

Conveners: G. Gradoni, G. Tanner

Physics-based approaches are entering and complementing information theoretic formulations for wireless communications, assisting them in the description of non-thermal noise and describing propagation mechanisms in complex environments. Large scale, multiply connected indoor scenario are challenging to be tackled with conventional ray tracing algorithms at mmWave regimes, as they converge slowly and become inaccurate in presence of boundary roughness, diffraction and diffusion in the (very) high frequency limit. Statistical phase-space methods aim at compensating those drawbacks by borrowing concepts developed in semi-classical analysis and wave chaos. A wide range of applications can be described accurately, new collective phenomena exploited for an efficient energy transfer, path loss and clustering dynamics can be enriched and understood better. 5G and chip-to-chip communications constitute a new where small-scale wireless communications take over as a building block for large-scale telecommunications.

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Commission E - "Time Reversal in Electromagnetics"

Conveners: F. Monsef, J. Derosny

The time reversal technique is based upon a feature of the wave equation known as reciprocity: given a solution to the wave equation, then the time reversal (using a negative time) of that solution is also a solution. This occurs because the standard wave equation only contains even order derivatives. Time reversal techniques can be modelled as a matched filter. The focus of this session is to discuss many aspects of time reversal methods as applied to problems in electromagnetics.

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Commission E - "Solar Power Satellites"

Conveners: M. Haredim and J. Gavan

This session addresses the concept of the Solar Power Satellite (SPS) systems proposed by P. Glaser in the 1970.This multidisciplinary project issue is to produce in huge satellites in space a big amount of energy from the sun with maximum conversion efficiency due to the space environment. This energy is transformed in the satellites to a microwave (MW) beam reaching terrestrial stations by Wireless Power Transmission (WPT) using huge rectifier antennas (RECTENNAs) arrays to produce efficiently big amount of green Electrical energy for human use. These SPS systems could contribute to replace polluted limited sources of coal and gas energy by green unlimited energy source from the sun. The required satellites constructed by future robots could be Low Earth Orbit (LEO) satellites at an altitude of several hundred km which supply the ground station for a limited short time each earth orbit or better Geostationary satellites in an orbit around the equator at an altitude of 36000km for a permanent supply of energy. A lot of R&D activities were done especially in Japan and by the NASA, also two special issues of the URSI RSB were dedicated to this subject, but the implementation of this project can still take several decades of efforts. This session achievements could be enhanced by dealing also with the implementation of long distance WPT of lower power levels and of shorter distances in the atmosphere from space to ground or from ground to space where MW is a must or between two space stations where LASER may be preferred. The main contributions of Commission E to the session are: The analysis and development of EMI mitigation techniques of WPT systems to the operating communication, RADAR or other wireless services, to the design and control of the MW beam to be safe, not to exceed power density limits and obtaining optimal power conversion from sun energy to output electric power on the terrestrial station.

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Commission E - "Open Session"

Conveners: D. V. Giri, F. Gronwald

This session will accept any papers falling within the terms of reference of Commission E and not covered elsewhere.

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Commissions EB - "Chaos and Complexity"

Conveners: G. Gradoni, G. Tanner, A. Shivola

Statistical electromagnetics and wave chaos aim at characterizing and understanding the field propagation in complex circuits and environments. In particular, chaotic dynamics offers a unique platform for modeling wave systems with an arbitrary number of degrees of freedom. Recent studies in wave chaos have attracted researchers in electromagnetic theory and universal statistical properties have been used to study large electromagnetic systems without solving the full-wave problem. Circuits within printed circuit boards are now modeled as complex statistical sources that can be treated through semi-classical as well as random matrix theories. Novel theoretical models have been developed describing fields through complicated electromagnetic environments - including electromagnetic reverberation chambers - also accounting for coupling through apertures and including losses at both microwave and mmWave regimes.

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Commissions ECJ - "Spectrum Management"

Conveners: J. Pedro , A. Tipaldy, A. Shukla, H. Liszt

The focus of this session on spectrum management and spectrum utilization is of high interest to the community. We expect to give a short report of the related WG06 activities during the last period, along with our views on spectrum management, and on hot topics of today. International and local Chinese contributors will be invited such that first-hand reports on controversial spectrum management issues will be presented.

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Commissions EFGH - "Natural Electromagnetic Noise and Radio Sensing Applications in Terrestrial and Planetary Environments"

Conveners: Y. Hobara, C. Price, T. Ushio, M. Fullerkrug

This joint session aims at presenting recent works on electromagnetic noise and phenomena in the terrestrial atmosphere and upper atmosphere (ionosphere/magnetosphere). Different kinds of electromagnetic noises will be dealt with, including atmospheric noises originated in lightning discharges (ELF Schumann resonances, mesospheric optical emissions etc.), man-made noise and noise due to wave-particle and wave-wave interactions. Corresponding electromagnetic noise environments on other planets are welcome. We are particularly interested in applications of natural EM observations in remote sensing such as monitoring, detecting and forecasting natural hazards, such as thunderstorms, severe weather, space weather and seismic events.

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Commissions EFGHJ - "One-Day Workshop on RFI Mitigation and Characterization"

Conveners: F. Gronwald, R. Bradley, T. Bullet, H. Rothkaehl, D. Le Vine, A. Maitra, M. Haredim, J. Gavan, V. Deniau, P. de Matthaeis

It is the aim of this workshop to bring together researchers, engineers and users from all radio science disciplines to consider how RFI affects their respective fields, to develop mitigation strategies, and to foster cooperation and collaboration. Particular attention will be given to the impact of new and future sources of RFI, spectrum management challenges, and new technology developments. Recent progress towards the ultimate goal of being able to do observations with real-time mitigation of the undesired signals, while leaving the desired signals minimally affected, will be discussed.

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Commission E - "Short Course on IEMI and Cyber threats for Wireless Communications"

Conveners: V. Deniau and C. Kasmi

Intentional Electromagnetic Interference (IEMI) can degrade both voice and data wireless communication systems. This workshop will discuss the main characteristics of such interference, including smart IEMI threats, also known as cyber threats.

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Commissions AE - "Mode-Stirred Chambers"

Conveners: Luk R. Arnaut, Tian Hong Loh

Electromagnetic reverberation chambers (RCs) (also known as mode-tuned or mode-stirred chambers) are now common RF test facilities used primarily for electromagnetic compatibility (EMC) measurements and evaluation of wireless communication performance. They are enclosed screen room typically equipped with mode stirrer(s). Ideal chambers have intrinsic properties of statistical isotropy and statistical homogeneity that provide several unique features for testing. To obtain statistically uniform electromagnetic fields and hence the desired information, the modes of the chamber are normally perturbed by either mechanical stirring or frequency stirring. Comparing with other types of RF testing facility, the cost of RC construction is relatively low and the test configurations inside RCs is relatively non-critical with regard to position and orientation. Nevertheless the relevant data analysis and interpretation is more complex. Recent advances in reverberation chamber metrology and statistical theory have added other electromagnetic investigations into the mix, particularly antenna efficiency measurements and multi-path propagation in high-mobility EM environments. Still some theoretical and metrological problems are open, as well as practical aspects in the lower frequency use. This session focuses on presenting the recent advances in the theory and the applications of RC technology, RC test facilities, measurement techniques, RC simulation and modeling, and EMC applications.

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Commissions GEH - "Seismo Electromagnetics (Lithosphere-Atmosphere- Ionosphere Coupling)"

Conveners: Sergey Pulinets, Yasuhide Hobara, Hanna Rothkaehl

The results of electromagnetic and ionospheric monitoring do not leave the place to doubts on the electromagnetic and ionospheric anomalies existence and their connection with seismic activity. Quasistationary electric fields, electromagnetic emissions in wide band of electromagnetic spectrum, anomalies of radio wave propagation, ionospheric anomalies are now the hot spots at all conferences of geophysical thematic. But still we lack the physical substantiation of many of registered effects. Multi‐parameter measurements in seismically active regions and cross validation of results obtained by different groups will help to understand the background physics of the observed anomalies. This session will accept papers demonstrating progress in understanding the ionospheric and electromagnetic effects preceding strong earthquakes including experimental findings and theoretical papers on lithosphere-atmosphere-ionosphere coupling.

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Commissions HGE - "Atmospheric, Ionospheric, Magnetospheric and High Energy Effects of Lightning Discharges"

Conveners: S. Celestin, N. Liu, M. Fullekrug

The recent discovery that lightning discharges can cause energetic radiation, relativistic particles, and transient luminous events has marked a profound advance in our understanding of the Earth's atmospheric electrodynamic behaviour. This session explores these novel processes and their impact on the atmosphere and the near-Earth environment. The session solicits contributions which advance knowledge in the areas of the global atmospheric electric circuit, lightning physics, transient luminous events, energetic radiation, relativistic particles, and their impact on the Earth's atmosphere, ionosphere and magnetosphere. One key focus of the session will be novel observations on board space platforms, such as the lightning imagers on geostationary satellites, the TARANIS satellite, the ASIM payload on the International Space Station, and related ground based observations and their modelling. Interdisciplinary studies which emphasize the connection between atmospheric layers and the relation between atmospheric electricity and climate change are particularly welcome.

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Commissions JEFGH - "Characterization and Mitigation of Radio Frequency Interference"

Conveners: Frank Gronwald, V. Deniau, Richard Bradley, Terry Bullet, Hanna Rothkaehl, David LeVine, Amit Kumar Mishra, M. Haredim, J. Gavan

In this session, radio frequency interference (RFI) issues will be discussed that are of particular importance for observational sciences such as radio astronomy, microwave remote sensing of the Earth, and solar and ionospheric studies where highly sensitive measurements are necessary.

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Commissions KBE - "Uncertainty Management and Stochastic Methods in Experimental and Numerical Electromagnetism, Environmental Exposure Assessment and Dosimetry"

Conveners: Joe Wiart, Tonging Wu, Ari Sihvola, Gabriele Gradoni

The increasing use of RF wireless communication system is supported by complex and agile technologies and network architectures. It has also induced large variability of usages. The management of such complexity has requested innovative approaches experimental and Numerical Electromagnetism, environmental exposure assessment and dosimetry. This session is devoted to recent progress and application of methods based on advanced statistical methods (e.g., Surrogate modelling, Polynomial Chaos, Kriging, Machine Learning, Sensibility analysis, etc. ) in experimental and Numerical Electromagnetism and dosimetry.

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Commissions KE - "EMC in Biomedical Applications"

Conveners: Frank Gronwald, Lars Ole Fichte

Modern medical technology combines different engineering, scientific, technical, and medical knowledge to a field of activity which is indispensable for the health industry, one of the largest industrial sectors of the world. Due to its strong development, medical technology is counted among the ten high potential technologies of the 21st century. Since medical technology establishes a cross-disciplinary connection between medicine and the engineering sciences, this session welcomes submissions from the medical-instrument sector with EMC-related aspects of system engineering, electronics, sensor systems, computer and material sciences.