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The field structure on individual elements of a finite 3×3 double layer FSS for long wavelength is measured in the near field. The transmitted fields are compared at different frequencies and non-uniformities in individual element excitations at different points in the array are observed as indications of finite edge effects in an electrically small array.
Designers of civil communications systems face an increasing strain on the radio frequency spectrum as demand increases. Much high speed data access is required indoors and it is therefore reasonable that future buildings should be designed with wireless communications systems in mind. Buildings could be equipped to offer a controlled propagation environment with isolation of secure data and blocking...
A novel Finite Element Model (FEM) is used to determine the coefficients of friction between the bristles of a cutting brush of street sweepers and a concrete road surface. The model deals with brush dynamics and entails a 3-D transient non-linear structural analysis involving contact. Each row of clusters is modeled by a single beam. The beams are subjected to inertia forces, and the surface is rotated...
This paper describes the development and implementation of an analytical 3-D thermal model for fast and accurate thermal simulation of power device modules in electro-thermal converter simulation. A Fourier-based solution is used to solve the 3-D heat equation. The solution can describe the variation of temperature through the whole IPM structure with time. The model can simulate thermal interactions...
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