Search

In the last decade, various works have demonstrated that a class of artificial material called metamaterials (MTM) can synthesize mu-negative (MNG) media capable of evanescent-wave focusing which largely enhances the magnetic coupling between coils, which is the basic mechanism of Inductive Power Transmission (IPT) systems. In the present work, MTM-enhanced coupling in IPT systems is examined through analytical and numerical results, which are validated by experimental data. Adopting a transmission-line (TL) based approach to describe the general MTM-enhanced IPT system, it is evidenced that MNG MTMs can be interpreted as a negative impedance from a circuital point of view. [ABSTRACT FROM AUTHOR]

This paper aims to present an evaluation of noncanonical mode stirred chambers, whose excitation is carried out by transmission lines. Many configurations are taken into account regarding the influence of the wire arrangement and their phase shift excitation on the field homogeneity. The simulations were carried out within the framework of finite integration technique (FIT) and transmission- line modeling (TLM) methods. Experimental and theoretical results are presented regarding the chamber suitability to electromagnetic compatibility (EMC) tests. It is emphasized the viability of extending the present standard frequency range recommendation to lower frequency values. [ABSTRACT FROM AUTHOR]

Focuses on a study which proposed the application of constrained decision planning in the optimization of lightning protection system (LPS). Assessment of the threshold levels of LPS when sample structure is struck by lightning; Discussion on time-domain simulation to analyze magnetic flux; Methodology and results.

Discusses transient induced voltage computation in a high building struck by lightning. Prediction of electromagnetic (EM) fields and their induced effects; Important aspects of the method used for evaluating the lightning induced voltage.