EuCAP 2018 - Keynote and Invited Speakers

Invited keynote speakers


Prof Sir John Pendry, Imperial College, UK
Controlling THz raditation with graphene

When graphene is doped to give a finite conductivity, it supports plasmons in the THz regime. Although these do not couple directly to external radiation, coupling can be induced by forming a grating in the graphene of a suitable period and thus produce very strong absorption of radiation but typically over a narrow band of frequencies.
Here I shall show that a suitably engineered metasurface can result in strong absorption over a wide range of THz frequencies. The effect has the potential to be switched at GHz rates.



Prof Baoyan Duan, Xidian University, China
On innovation, simulation, mode experiments and engineering of the five hundred meters Aperture Spherical radio Telecope (FAST)

This keynote speech will give a comprehensive introduction about the development of the Five-hundred-meter Aperture Spherical radio Telescope project (FAST) located in Guizhou Province, south west part of China.
Firstly, the novel design of FAST project with three innovations is presented in detail. Secondly, the theory, methodology and numerical simulation of project are described. Thirdly, the scale models with one percent and one tenth of the real 500 meters merit are developed and tremendous amount of experiments were experienced with valuable results.
The above research works had paved a solid way to build the practical FAST telescope. And finally, the engineering implementation of FAST is discussed and the rare initial observing results are presented.

 


Invited speakers

Prof Trevor Bird, SIRO, Australia
Recent advances in the comprehension of mutual coupling in antenna arrays

Mutual coupling is an important aspect of antenna design, but it is often neglected due to complexity or to obtain an approximation of the radiation pattern. Nevertheless, neglecting it is an over-simplification and for best performance it should be included. In addition, some advantages follow in understanding it.
Mutual coupling is a function of distance between the antennas and It depends on the radiation pattern of the antenna elements and their polarisation. The level of coupling is dependant on the fundamental currents causing the coupling. For instance, coupling is stronger in the H-plane of dipoles while for slots it is strongest in the E-plane. By means of this duality and/or Booker’s relation it is possible to convert an unknown coupling problem to one that may have a simpler, or known, solution.
The intention of this talk is to describe the physical effects of mutual coupling in a variety of antennas such as apertures and patches, to give some recent advances in ways of including it and to show applications where the performance is improved by taking it into account. Another recent aspect is the development of ways for minimising its effects will be described.
Several existing methods such as tapering or use of guard elements has been improved recently through use of metamaterials and periodic structures. Compensation methods are now used as well including external methods where a special network is placed at input of the array or internal methods where loaded or driven dummy elements are incorporated in the array. The talk will include a discussion of ways of using mutual coupling to extend the performance of antenna arrays such as gain or bandwidth

 

 


Dr Felix Miranda, NASA, USA
Advanced communications technologies in support of NASA mission

NASA is currently working in expanding communications capabilities to enhance and enable robotic as well as human exploration of space and to advance aero communications on Earth. This presentation will discuss some of the research and technology developments being performed at the NASA Glenn Research Center in aerospace communications in support of NASA’s mission.
An overview of the work conducted in-house and in collaboration with other NASA Centers, Industry, Academia and Other Government Agencies (OGA) to advance radiofrequency (RF) and optical communication technologies in the areas of antennas, power amplifiers, receivers, and cognitive communications systems, among others will be presented. The roles of these and other RF and optical communication technologies in enabling NASA next generation aerospace communications architecture will be also discussed.

 



Prof Mahta Maghaddam, University of Michigan, USA
Medical thermal therapy and monitoring using advanced inverse scattering techniques

The use of microwave technologies in treatment of cancer has gained substantial attention in recent years. This includes not only delivering thermal treatments for hyperthermia and ablation, but more recently, also using microwave imaging for providing closed-loop guidance during thermal treatment procedures.
With the observation that dielectric properties of biological tissue are sensitive to changes in temperature, we have successfully shown that we can generate real-time 3D temperature maps of tissue using microwave inverse scattering during thermal therapy treatments. This microwave monitoring method relies on accurate and fast inverse scattering for reconstruction of complex dielectric constant with multistatic microwave measurements.
A perennial problem in performing inverse scattering experiments is how to measure the scattered “fields.” Microwave measurement systems do not measure fields but voltages. To address this problem, we have proposed the “vector Greens’ function” as an alternate formulation of the volume integral equation, where instead of the scattered electric field, the integral equation is written in terms of the voltage.
This presentation will go over the formulation and various enhancements made possible by this method, and will show a succession of experimental demonstrations and image reconstruction results for real-time thermal monitoring.




Dr Wei Hong, Southeast University, Nanjing, China
Multibeam array antennas for 5G massive MIMO Systems

In this talk, some research advances in multibeam array antennas for 5G massive MIMO systems in the State Key Laboratory of Millimeter Waves (SKLMMW), Southeast University, are reviewed, including the principle and prototypes of full-digital multibeam arrays, hybrid multibeam arrays, passive multibeam arrays in sub-6GHz (3.5GHz and 5GHz bands) and millimeter wave bands (26GHz, 38GHz, and 45GHz bands). The advantages and drawbacks of the different types of multibeam arrays are also discussed.




Prof Reiner Thomä, Ilmenau University of Technology, Germany
Cooperative passive coherent location - a vertical radar service in 5G?

Fifth generation (5G) mobile communication promises many new vertical service areas beyond communication and internet data access. We propose CPCL (Cooperative Passive Coherent Location) being a distributed MIMO radar service which could be offered by mobile radio network operators as a service for public user groups. CPCL comes as an inherent part of the radio network and takes advantage from the most important key features proposed for 5G. It extends the well-known idea of passive radar (also known as Passive Coherent Location, PCL) by introducing cooperative principles. These range from cooperative, synchronous radio signaling and MAC up to radar data fusion on sensor and scenario levels.
Using the software defined radio and network paradigms and real-time mobile computing facilities, CPCL promises to become a ubiquitous radar service which may be adaptive, reconfigurable, and, hence, cognitive. Because CPCL makes double use of radio resources (both, in terms of frequency bands and hardware), it can be considered a green technology.
Although we introduce the CPCL idea from the viewpoint of vehicle-to-vehicle/infrastructure (V2X) communication, it can be definitely also applied for many other applications in industry, transport, logistics, and for safety and security applications. As CPCL, first of all, is a radio technology we will put focus on multipath radar signal processing and PHY resource exploitation.




Prof Tian Hong Loh, NPL, UK
Metrology for 5G and emerging wireless technologies

High bandwidth mobile communication is an essential tool for wealth creation. Focusing on user experience, the fifth generation (5G) communications promise to deliver millisecond latency, multi-Gbps data capacity, low energy consumption, and seamless connectivity between billions of people and trillions of devices.
Several standards bodies (e.g. 3GPP, ETSI, IEEE, etc.) and worldwide research communities (e.g. 5G-PPP, IMT-2020, 5G Americas, etc.) are facing the challenge of diverse 5G technological requirements. To develop the necessary infrastructure and standards for 5G and beyond they have started seeking for a global consensus over visions, applications, standards, and identification of suitable spectrums.
Metrology to underpin all aspects from signals, devices to systems is essential for the development, manufacture and deployment of 5G and emerging wireless technologies. In particular, testing at mm-wave bands presents challenges over antenna and propagation characterisation due to their higher losses at these frequencies. A raft of new technologies is anticipated to be considered in both sub-6GHz and millimetre wave (mm-wave) spectrum bands to support a significantly increased user density.
This talk gives an overview of metrological capabilities and testbeds developed under several UK and EU programmes as well as overview of other international effort. The topics to cover include signal-to-interference-plus-noise ratio (SINR), sub-6GHz multiple-input-multiple-output over-the-air (MIMO-OTA), massive MIMO & mm-wave MIMO testbeds, smart antenna & mm-wave hybrid beamforming phased array testbeds, etc.




Prof Cyril Luxey, University of Nice, France
Mm-wave antenna-system designs dedicated to high-data rate communications

Developing high data-rate wireless networks is of paramount importance to meet the growing demand of mobile services. To this end, millimeter-wave (mmW) System-on-Chip (SoC) approach in CMOS technology was extensively developed for the deployment of Gb/s wireless systems like WiGig at 60 GHz (up to 7 Gb/s). With the upcoming transition to 5G standard, large bandwidths (BWs) are now required to provide data rates higher than 10 Gb/s. MM-wave and Sub-THz frequency bands are strongly considered since BWs of several 10s of GHz are easily accessible.
Experimental 100 Gb/s wireless links using III-V photonic technology have been demonstrated above 200 GHz. Indeed, photonic transmitters feature naturally higher BWs (>50 GHz) than solid-state transmitters. However, either if a solid-state or a photonic based-link is employed to reach the aforementioned high-data rates, broadband efficient integrated Antenna-in-Package (AiP) are needed either as stand-alone antennas for short communication links or as antenna-sources of a larger quasi-optical radiator for long-distance communication links (>100m).
Significant advantages of this approach are high-volume manufacturing capability and high electronics integration level, both of which result in lower associated costs.
This presentation will discuss antenna-system performance already obtained using organic packaging technologies and 3D-printed quasi-optical antenna-solutions from 60 to 240GHz with point-to-point transmission link demonstration.

 



Steve Nichols, NSI-MI Technologies, USA
Optimising RF instrumentation for challenging measurements

As antenna applications evolve to new technologies, test facilities must adapt to them. Broader application of millimeter-wave frequencies, more frequent use of active electronically steered array technology, and a desire for thorough verification are presenting significant challenges to antenna test ranges.
The number of measurement points, frequencies, antenna states, and antenna ports has grown substantially and continues to grow. Some antenna test requirements have resulted in extremely long test times with a vast amount of data to be processed and analysed. The impact of higher test costs and longer delivery schedules can be substantial, and test facility capacity may be stretched to its limits.
As a result, instrumentation products and automated measurement systems are being pressed to provide enhanced performance to meet the challenges of these rapidly growing test requirements. This presentation describes several ways to reduce test time by optimising the data acquisition process and by giving due consideration to RF and millimeter-wave performance trade-offs. Specific examples of test ranges that illustrate measurement challenges and solutions will be provided. A view to the future will conclude the talk.

 



Prof Matthias Pätzold, University of Agder, Norway
Non-stationary mobile radio channels: Modelling, analysis and applications

In recent years, there has been more and more evidence that the generally accepted wide-sense stationary assumption is not fulfilled in real-world mobile radio channels. This has resulted in a shift from the modelling of stationary channels towards the modelling of non-stationary channels.
This presentation provides a comprehensive overview of state-of-the-art techniques which have recently been developed for the modelling, analysis, and simulation of non-stationary mobile radio channels. The presentation strives for providing a fundamental understanding of many issues currently being investigated in the field. The following topics will be covered during the presentation:
• A new paradigm for modelling of mobile radio channels
• Introduction and basic principles of non-stationary mobile radio channels
• Modelling of time-variant Doppler frequencies and time-variant propagation delays
• Definition and analysis of quasi-stationary intervals
• Classes of non-stationary mobile radio channels
• Spectrogram and Wigner-Ville distribution
• Improving the spectrogram by using massive MIMO techniques
• Design and analysis of channel models with time-variant model parameters
• Higher-order statistics of non-stationary mobile radio channels
• Applications with emphasis on fall detection and activity recognition

 



Prof Naoki Shinohara, University of Kyoto, Japan
RF-DC conversion efficiency of a rectenna - rectifying antenna

A rectifying antenna (rectenna) can be used for wireless power transfer (WPT) through radio waves and for energy harvesting from ambient radio waves. A rectenna is composed of an antenna and a rectifier with a diode. Microwaves are often used as a carrier of wireless power, which is called microwave power transfer (MPT).
The RF-DC conversion efficiency of a rectenna is one of the most important characteristics of a MPT system or an energy harvesting system. The antenna and the rectifier are usually developed individually and combined at the end. However, the RF-DC conversion efficiency can be increased via combining the antenna and the rectifier.
In this study, some approaches to increase the RF-DC conversion efficiency of a rectenna in consideration of combination of the antenna and the rectifier are explained.

 

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