... algorithms. Next, in Section 4 we present the analysis of optimization results, and the paper concludes with a discussion in Section 5. © Emerald Group Publishing Limited 2013 Vector hysteresis Magnetic material modeling Chaotic harmony search Vectors Materials Harmony search (HS...

... condition. In the case of the TM polarization, instead, the AMC boundary condition is effectively achieved by using a material with vanishing permittivity. The role of the permittivity in the three polarizations is discussed. Finally, possible implementations and applications at microwave and optical...

... model can be refined with further training. Practical implications – Low profile absorbing materials are of relevant industrial interest both for radar cloaking and anechoic chambers. Originality/value – The transmission line model combined with NNs and GA optimization is capable of speeding...

... for the usefulness of the metamaterial concepts in antenna miniaturization problems. Originality/value – Rigorous experimental characterization of several meta material loaded antennas and proof of principle results were provided. From the far field pattern cuts the half-power beam-widths on the two...

...Andrea G. Chiariello; Carlo Forestiere; Giovanni Miano; Antonio Maffucci Purpose – Nowadays, nano-antennas or nanoscale absorbers made by innovative materials such as carbon nanotubes are gaining more and more interest, because of their outstanding features. The purpose of this paper...

..., and it turns out to be quite robust to material losses as well as geometrical and constitutive-parameter truncation. Originality/value – The results provide further evidence and insight in how SNG-like responses may be emulated (within narrow parametric ranges) by suitably-engineered spatial...

...Prof. Oszkár Bíró, Prof. David A. Lowther and Prof. Piergiorgio Alotto; Rindra Ramarotafika; Abdelkader Benabou; Stéphane Clénet Purpose – Classically the magnetic material models are considered with a deterministic approach. Nevertheless, when submitted to the fabrication process, the magnetic...

... investigation. The influence of material parameters on the structural vibrations is carried out in order to describe the laminated structure of stator core stack with a homogeneous material model. Design/methodology/approach – The finite element method is applied for a numerical modal analysis. Therefore...