In this paper, the possible realization of the electromagnetic (EM) absorber as a thin metasurface is considered. The metasurface is based on establishing a passive surface of electric and magnetic currents using the Huygen’s principle. So, the absorber is named Huygens Absorber (HA). The metasurface can be designed using split meander lines with spiral rings. In this way, both sides of the sub...

Micro-perforated absorber is a newly developed sound absorber, and it has a number of attractive features: • Unlike conventional perforated absorbers, micro-perforated absorber can be made from transparent materials like plastic glass. • Unlike commonly used fibrous absorptive materials, micro-perforated absorber is fibrous-free and thus, there is no health concern. • Micro-perforated membranes...

A broadband Circuit Analogue (CA) absorber using double-circular-loop array is investigated in this paper. A simple equivalent circuit model is presented to accurately analyze this CA absorber. The circuit simulation of the proposed model agrees well with full-wave simulations. Optimization based the equivalent circuit model, is applied to design a single-layer circuit analogue absorber using d...

Abstract Wave energy converters (WEC) have been researched extensively to harvest large amounts of untapped ocean renewable energy. Floating-type point absorbers are a type WEC that converts the wave electrical energy, by utilizing relative motion multi-body system mainly consisting floating section and reaction section. The design floating-type is not straightforward needs special attention un...

Extreme waves are critical for the WEC’s development. CFD toolboxes have been widely used in simulation of extreme waves–structure interaction. However, quality mesh is a sensitive issue; large response can lead to deformation and subsequent numerical instability. In this paper, 100-year chosen from environmental contour Humboldt Bay site California, their interaction with WEC modeled using ope...