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The continuity of shield wires is often broken for losses reduction purposes in high voltage transmission lines. The accurate simulation of the effects of this practice on power line communications in multiconductor transmission lines is performed in the time domain by means of a finite-difference method. Losses in wires and ground are accounted for by means of transient per unit length parameters...
New emerging threats, like intentional EMI, new possibilities offered by material technologies, a renewed awareness of theoretical subtleties have driven several advancements and researches in electromagnetic shielding aimed not only at improving the protection levels as commonly intended but also at achieving deeper insights into the various and fundamental issues involved in shielding problems.
A novel Frequency Selective Surface (FSS) is proposed for the design of polarization-insensitive metamaterial absorbers that operate around 1 GHz, where the first resonances of small commercial enclosures take place. The novel FSS is based on the simplification of an alternative Roman maze. It shows a strong sub-wavelength response and is promising for the design of compact planar absorbers with excellent...
A planar screen made of a periodic array of small resonant particles showing a strong magnetic resonance is studied in detail. Two types of inclusions are considered: the double split-ring resonator (SRR) and the spiral resonator (SR). The homogenized screen is shown to behave as a homogeneous slab with an effective magnetic permeability having large positive or negative values around the magnetic...
The shielding performance of planar screens made of microstructured materials are investigated. In particular, the considered microstructured materials may consist of periodic or random arrangements of small metallic and/or dielectric particles. The canonical problem of normal plane-wave incidence is studied by means of homogenized approaches and/or through full-wave calculations. The role of the...
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