Bogdan Adamczyk

This article discusses the impact of a solid conducting shield on the electric and magnetic fields when a normally incident uniform plane wave penetrates it. The shield is made of a good conductor with no aperture and a thickness much greater than the skin depth at the frequency of interest. A good conductor is defined as a medium in which the conduction current density is much greater than the displacement current density, or equivalently, the loss tangent of a medium (σ ⁄ ω >>⊇1).

This article presents a concept of the loss tangent of the medium, which is often used to determine if a medium is a good conductor. A good conductor is defined as a medium in which the conduction current density is much greater than the displacement current density, or equivalently, the loss tangent of a medium (σ ⁄ ωε >>1).

This is the third and final article in the series investigating the effectiveness of decoupling capacitors while varying the topology of vias, trace length between the decoupling capacitor and the IC power/ground pins, and distance from the internal power-ground plane pair. The first article [1] introduced the electrical schematic, via and trace topologies, as well as PCB topology.