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A dumbbell-shaped slotted leaky-wave antenna based on composite right/left-handed metamaterial structure is proposed to improve the backward scanning bandwidth and achieve consistent gain. The antenna consists of substrate integrated waveguide (SIW) unit cells array, which is configured by a dumbbell-shaped slot, cut on the upper layer of the SIW, and an embedded patch underneath the dumbbell-shaped...
In this study to show that the paraffin-based lens can handle high frequencies for metamaterial characterization, two dielectric lenses are fabricated using a molding process for the frequency range from 10 to 18 GHz. The fabricated lenses guarantee low cost and ease of implementation compared to the other machining and material methods. To verify the proposed lens performance, two similar paraffin...
Under certain circumstances, plasmonic coatings could be a solution to the design of stealthy targets over the microwave range. In this communication, Perfectly Electrically Conducting (PEC) spheres with plasmonic coatings are studied in the microwave spectrum. Two main issues are raised. The first one is related to the fact that the exact computation of the Radar Cross Section (RCS) of finely textured...
A compact planar monopole antenna backed by an electromagnetic bandgap (EBG) structure is presented. The antenna is conformal to the human body and is intended for wearable applications in wireless body area networks. It operates at 2.45 GHz, and is fabricated on a 68mm by 38mm by 1.57mm semi-flexible substrate. The performance of the antenna does not degrade with structural bends along both of its...
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