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The analysis of absorption mechanism in a planar radome absorber is presented. The absorber is composed of an array of cylindrically shaped absorber, made from materials having both magnetic and electric losses. By analyzing the field distribution and power loss density within the structure, we show that the dielectric resonance mode is responsible for the absorption. It is further investigated that...
Analyses on the diameter of the ground plane of helical antennas show that, when the diameter of this plane is slightly smaller than the one of the helix itself, backfire radiation is achieved. Considering this ground plane as a director, the addition of more ground planes - or directors - is proven to increase the directivity of the antenna. With these reduced ground planes not causing any blockage...
Within radar cross-section measurement ranges polymeric foam columns are often used for the positioning of radar targets since they have a low radar cross-section. Although the shape of such dielectric structures can be optimized using electromagnetic simulation software, an analytical expression for their radar cross-section is useful for general design rules. Therefore an expression for the monostatic...
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