M. Bandinelli

Efficient Iterative Physical Optics algorithm for electrically large scatterers

The Iterative Physical Optics (IPO) is an iterative high frequency technique, which was originally developed for analyzing the scattering from open-ended cavities with perfectly electrically conducting (PEC) walls (F. Obelleiro, J. L. Rodriguez, and R. J. Burkholder, IEEE Trans. Antennas Propag., vol. 43, no. 4, 356-361, 1995). Subsequently, it was extended to the case of impedance boundary conditions (F. Obelleiro, M. G. Araújo, and J. L. Rodriguez, Micro. Opt. Tech. Lett., vol. 28, no. 1, 21-26, 2001) and of dielectric thin slabs (R. Hémon, P. Pouliguen, H. He, J. Saillard, and J. F. Damiens, Progress In Electromagnetics Research, vol. 80, 77-105, 2008). More recently it was applied to compute the scattered field and the radar cross section of electrically large and realistic complex targets (R. J. Burkholder, Ç. Tokgöz, C. J. Reddy, and W. O. Coburn, Appl. Computational Electromagn. Soc. J., vol. 24, no. 2, 241-258, 2009), such as tanks, airplanes, etc. In its various formulations and applications, the authors made a strong effort in accelerating the converge of the IPO algorithm and also in investigating the possibility of parallelize it. Recently, in (C. Tokgoz and V. Venugopal, 2013 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Orlando, Florida, USA, July 7-13, 2013) the authors also discuss the possibility of accelerating the computational burden of the IPO algorithm by using Graphics Processing Units (GPUs).

Recent developments on the Iterative Physical Optics for the analysis of electrically large scatterers

The most recent developments of an efficient Iterative Physical Optics (IPO) algorithm for analyzing the electromagnetic scattering of complex and electrically large scenarios are presented. The algorithm predicts multiple interactions between the objects comprised in the scenarios under the Physical Optics (PO) approximation. Various techniques for accelerating and parallelizing the algorithm have been used, thus obtaining an efficient tool that can be used to realize a novel class of high-frequency solvers.

Metasurface-by-design: An emerging concept for antennas and beam forming networks

This paper discusses about design, analysis and optimization aspects of metasurface antennas. The design procedure of metasurfaces for the realization of shaped beam antennas and application examples are presented. For the fast analysis and for a suitable use in an optimization loop a customized efficient full wave tool has been developed within the 3DAMxLAD module of ADF-EMS (Antenna Design Framework - Electromagnetic Satellite).

Incremental Multilevel Filling and Sparsification for the MoM Solution of Multiscale Structures at Low Frequencies

In this paper, we present an incremental multilevel matrix filling and sparsification scheme for the method of moment (MoM) solution of the electric field integral equation at low and very low frequencies. The proposed scheme allows a strong reduction of the memory requirements without a loss in accuracy. Numerical results show the method performance in terms of memory requirements, CPU time and accuracy with respect to the standard MoM, the multilevel fast multipole algorithm, and the adaptive cross approximation.

Time efficient NF test technique for AIT/AIV with stationary satellite

Nowadays, the final RF functional verification has to be performed on the integrated satellite due to the increasing complexity and stringent performance in RF instruments and payloads. To reduce the global time and cost of future Antenna Integration and Test Verification (AIV/AIT) it needs to develop advanced test methodologies. This paper shows the results of a functional testing solution for RF end-to-end antenna testing. The approach proposed is based on structured use of existing measurement capabilities and advanced numerical modeling tools. The scope of this activity is to show the possibility to achieve accurate and fast measurement results using a radical measurement under sampling with respect to the conventional Nyquist criteria.