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High gain low profile of a square dense dielectric patch antenna using a perforated superstrate is presented. The proposed patch antenna is excited by the aperture coupled feeding technique. A dielectric superstrate is used to enhance the gain of the proposed antenna. By drilling a set of identical holes in the superstrate layer, the relative permittivity of the dielectric superstrate is reduced,...
New unit cells are arranged as an array to provide a gradient refractive index and to enforce the propagation of electromagnetic waves in a specific direction. This phenomena creates a new medium with different characteristics (εr, μr). Simulated results for the permittivity, permeability and refractive index of unit cells show gradual variation in the refractive index. The refractive index changes...
The purpose of this paper is to report the results, from laboratory-scale investigations, on the impact of intermediate thermal hydrolysis process (ITHP) on already digested sludge in general, and sludge carbohydrate content degradation process efficiency in particular. The ITHP performance data were compared with the performance of established conventional thermal hydrolysis process (THP). The degradation...
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