Publications de Ruzica Golubovic

The weighted averages method for semi-infinite range integrals involving products of Bessel functions

An efficient and accurate method, based on the weighted averages (WA) extrapolation technique, is presented for the evaluation of semi-infinite range integrals involving products of Bessel functions of arbitrary order. The method requires splitting the int ...

Institute of Electrical and Electronics Engineers2013

KUL and EPFL cooperation on numerical integration of Sommerfeld integrals

Juan Ramon Mosig, Ruzica Golubovic, Athanasios Polymeridis

This paper reports the result of the cooperation between KUL and EPFL on the numerical integration of Sommerfeld integrals (SI). Each institution is well-known for developing specific techniques suited for the evaluation of SI: double-exponential quadratur ...

2012

Numerical integration of Sommerfeld integrals based on singularity extraction techniques and double exponential-type quadrature formulas

Juan Ramon Mosig, Ruzica Golubovic, Athanasios Polymeridis

A direct integration algorithm for the evaluation of Sommerfeld integrals is presented. This algorithm does not require the deformation of the integration path to avoid spectral singularities. The integration is performed along the real axis only. The algo ...

2012

Efficient algorithms for computing Sommerfeld integral tails

Juan Ramon Mosig, Ruzica Golubovic, Athanasios Polymeridis

Sommerfeld-integrals (SIs) are ubiquitous in the analysis of problems involving antennas and scatterers embedded in planar multilayered media. It is well known that the oscillating and slowly decaying nature of their integrands makes the numerical evaluati ...

Institute of Electrical and Electronics Engineers2012

Some new developments of the weighted averages algorithm

Juan Ramon Mosig, Ruzica Golubovic

2011

Challenges in Computational Electromagnetics : Analysis and Optimization of Planar Multilayered Structures

Ruzica Golubovic

To meet strict requirements of the information society technologies, antennas and circuit elements are becoming increasingly complex. Frequently, their electromagnetic (EM) properties cannot be anymore expressed in closed-form analytical expressions mainly ...

EPFL2011

Fast computation of Sommerfeld integral tails via direct integration based on double exponential type quadrature formulas

Juan Ramon Mosig, Ruzica Golubovic, Athanasios Polymeridis

A direct integration algorithm, based on double exponential-type quadrature rules, is presented for the efficient computation of the Sommerfeld integral tails, arising in the evaluation of multilayered Green's functions. The proposed scheme maintains the e ...

Institute of Electrical and Electronics Engineers2011

Contributions to the modeling and design of reconfigurable reflecting cells embedding discrete control elements

Juan Ramon Mosig, Frédéric Bongard, Julien Perruisseau-Carrier, Roberto Torres Sánchez, Ruzica Golubovic

This paper presents new contributions to the modeling and design of reflecting cells embedding discrete control elements such as microelectromechanical system (MEMS) or diodes. First, a rigorous assessment of the different possibilities to simulate and mea ...

Institute of Electrical and Electronics Engineers2010

Spherical lens antenna designs with particle swarm optimization

Juan Ramon Mosig, Anja Skrivervik, Ruzica Golubovic, Benjamin Fuchs

A design procedure for spherical lens antennas is described. A particle swarm optimization (PSO) algorithm is coupled to a mode matching technique based on spherical wave expansion to analyze the lens antennas. The proposed methodology is applied to three ...

Wiley-Blackwell2010

Acceleration of slowly convergent series via the generalized weighted-averages method

Juan Ramon Mosig, Ruzica Golubovic, Athanasios Polymeridis

EMW Publishing2010