Keynote Presentation:  “Time‐Domain Techniques in High Frequency Nonlinear Simulation”

Prof. Thomas Brazil, University College Dublin, Irland

Abstract: For several decades, frequency‐domain oriented techniques such as harmonic balance and its variants have been dominant in high frequency simulation. However, new modes of high frequency circuit operation that may involve severe nonlinearity and extensive use of digital control or mixed–signal waveforms together with microwave carriers present significant challenges for simulation. There is a need to efficiently link EM representations with time‐domain techniques. Significant progress has been made in simulation techniques in recent years and this is reviewed briefly, indicating a few limitations and still outstanding challenges. Some novel features of an in‐house transient simulator are outlined, which has proven robust and accurate even for the most challenging applications.

Keynote Presentation:  “A Critical Look at Transformation Optics Approach to Designing Cloaks, Superlenses and Directive Antennas for Microwaves and Millimeter Waves using Metamaterials”

Prof. Raj Mittra, Pennsylvania State University, USA

Abstract-Transformation Optics (TO) is a relatively new field and it offers a novel approach to designing cloaks, superlenses and directive antennas that are based on coordinate transformation from one system to another. In this paper, we review the TO approach and identify some of the difficulties associated with the practical devices realized by using this approach, for instance polarization dependence, physical realizablity and dispersion. Following this we present an alternative method based upon Field Transformation (FT), as a way to mitigate some of these problems.

Keynote Presentation:  “Recent  advances in compact and reconfigurable waveguide filters”

Prof. Roberto Sorrentino, Electromagnetic Fields at the University of Perugia, Italy.