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Dr. Ing. Gianluigi Tiberi

Gianluigi Tiberi received the Laurea degree in Telecommunication Engineering and the Ph.D. degree from the University of Pisa, Pisa, Italy, in 2000 and 2004, respectively. From October 1999 to May 2000, Gianluigi Tiberi carried out his “Laurea” degree thesis “A novel statistical model for field and power prediction inside a building” at the Centre for Telecommunications Research, King’s College, London (Head: Prof. Hamid Aghvami). In November 2000 Gianluigi Tiberi joined, as a Ph.D. student, the Microwave and Radiation Laboratory at the Department of Information Engineering of the University of Pisa, conducting researches in the area of Applied Electromagnetics (Advisors: Prof. Giuliano Manara, Prof. Agostino Monorchio). From September 2002 to December 2002, he was a Visiting Ph.D. researcher at the Electromagnetic Communication Laboratory, Pennsylvania State University, University Park, PA, conducting researches on Electromagnetic Scattering (Advisor: Prof. Raj Mittra). 

Gianluigi Tiberi, after receiving the Ph.D. degree in April 2004, is currently with the Microwave and Radiation Laboratory at the Department of Information Engineering of the University of Pisa with a post- Ph.D. position; he is involved in a technical consultancy activity between the University of Pisa and I. D. S. Company, S. Piero a Grado, Pisa. From February 2006, he is collaborating with the Communications Research Group, University of Oxford, UK (head Prof. David Edwards). From February 2007, he is involved in a project collaboration with the Electromagnetic Communication Laboratory, Pennsylvania State University, PA, (head Prof. Raj Mittra). From March 2009 to March 2010, Dr. Tiberi spent one year at the Department of Engineering Science, University of Oxford, after receiving a Marie Curie Intra European Fellowships for Career Development, Seventh Research Framework Programme (id. FP7-PEOPLE-2007-2-1-IEF). His research interests include low and high-frequency derived approaches for solving electromagnetic scattering problems, electromagnetic propagation in complex environment, wide band/ultra wide band channel modelling, microwave imaging for medical application. Gianluigi Tiberi presented his results at many international conferences; moreover since 2004 he is lecturer for the “Foundations of Electromagnetic Fields” course, “Laurea” degree in Telecommunication Engineering, Faculty of Engineering of the University of Pisa, Italy. 

Research Activity 

The research activity has been focused on applied electromagnetics. Several topics have been investigated, among which: 

Analytical and numerical analysis of electromagnetic scattering, radiation and propagation problems- Novel techniques for an efficient and rigorous solution of electromagnetic scattering problems have been developed, namely the Characteristic Basis Function- CBF technique and its analytical versions, both in spatial and in spectral domain. These techniques permit to solve many different electromagnetic scattering problems, usually addressed by conventional Method of Moments (MoM)-based procedures, with a substantial reduction of CPU time and memory requirements, through the use of basis functions which are derived from high frequency solutions (high frequency/MoM hybridization) 

Modelling of wide band/ ultra wide band channel- The electromagnetic propagation in complex outdoor and indoor environment has been investigated, both analytically both by improving a ray tracing code, trying to highlight the impact of the physical layer for narrow band, wide band and ultra wide band communication systems. 

Modelling Ultra Wide Band Radio Propagation in Human Body -Ultra Wide Band (UWB) Wireless bio-medical sensors is a promising new application made possible by recent advances in ultra low power technology. Each sensor measures parameters of interest and sends the data in short bursts to a central device. In developing these sensors, detailed knowledge of the communication channel is essential. Moreover, UWB has a wide variety of applications in medical imaging. The aim of this activity, carried out at the Communications Research Group, University of Oxford, UK, under a Marie Curie Programme, was to study the interaction of the UWB signals with tissue of human body and develop appropriate channel modelling tools to be used either for communications or for UWB medical imaging. In particular, propagation characteristics of the different tissue have been investigated, providing an insight into precise relation of these quantities to frequency. 

UWB Microwave Imaging- This activity, carried out in collaboration with the Communications Research Group, University of Oxford, UK, deals with the development of novel techniques for imaging based on ultrawideband (UWB) microwave signals. First, a procedure based on the Mode Matching (MM) of Bessel functions has been analyzed; which enables the identification of the presence and location of significant scatterers inside cylindrically-shaped objects. Next, with the aim of investigating more general 3D problems, a method based on Huygens Principle (HP) has been introduced. Using the MM procedure leads to the generation/inversion of a rather small matrix; conversely, using HP to forward propagate the waves removes the need to solve inverse problems and, consequently, no matrix generation/ inversion is required. Together with their simplicity, the two methodologies permit the capture of contrast -the extent to which different media can be discriminated in the final image. Moreover, UWB allows all the information in the frequency domain to be utilized by combining the information from the individual frequencies to construct a consistent image. It follows that both the methodologies can identify the presence and location of significant scatterers inside a volume. Validation of the techniques through both simulations and measurements on cylinder and spheres with inclusions has been performed. Application of the proposed techniques to medical imaging is envisaged.