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In this paper we present the design of a multilayer absorber designed to perform over a wide frequency band, starting at relatively low frequencies. We design an absorber comprising of 20 layers, in which the material parameters are tapered in an exponential manner. In addition, the absorber itself is physically tapered at an angle so that it resembles a truncated pyramid. It is shown that the absorber...
Based on the constitutive tensor of the perfect regular polygonal cloak, the effects of different kinds of losses on the performance of regular polygonal cloak are investigated. The cloak is modeled and simulated using full wave package COMSOL MULTIPHYSICS. It is found that if the loss tangents are imposed on one or more components of constitutive tensors, especially on the off-diagonal components,...
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