2015 IEEE Chapter - Los Angeles, USA
IEEE Coastal Los Angeles Section
Antennas & Propagation Chapter

"Towards faster and more accurate Electromagnetic Simulation of Radiation,
Propagation, and Scattering Problems"

Tuesday, May 26, 2015

Presented by Professor Wojciech Gwarek, Professor at the Warsaw University of Technology, Poland and President of QWED, IEEE Fellow and Recipient of 2011 IEEE Microwave Pioneer Award
Electromagnetic simulation software packages have become indispensable tools of every  microwave and antenna engineer. Continuous progress in software and hardware brings also challenges to the users who should constantly upgrade their understanding of the new simulation capabilities and constraints. The presenter has more than 20 years of experience in development of time-domain electromagnetic software tools and will discuss some of the subjects he considers important and useful.
In the main part of the presentation four aspects were addressed:
• So called V2D approach to analysis of axi-symmetrical problems. By assuming analytical solution in one (angular) dimension, the problem can be reduced to two-dimensional simulation with decisive reduction of the required computer resources needed for particular simulation accuracy. Examples of analysis of large dual reflector antennas will be presented as a typical application of that approach. An example of the electrical field distribution amplitude generated by a dual-reflector antenna is shown in the picture above.
• Application of periodic boundary conditions for scattering problems will be discussed with explanation of the theoretical background for (somewhat unusual) application of complex numbers in time domain.
• Examples of time-domain simulation of wave propagation in metamaterials will be shown. They will refer to a recent vivid discussion about metamaterial properties within the IEEE MTT Society. The author presented his point of view in that discussion in his June 2014 publication in the IEEE Microwave Magazine.
• Discussion on how the progress in computer hardware influences the performance of electromagnetic software and what criteria should be used when purchasing a new hardware destined for electromagnetic analysis.