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Keywords = double-negative media (DNM)

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16 pages, 1789 KB  
Article
A Thin C-Band Polarization and Incidence Angle-Insensitive Metamaterial Perfect Absorber
by Humberto Fernández Álvarez, Maria Elena De Cos Gómez and Fernando Las-Heras
Materials 2015, 8(4), 1666-1681; https://doi.org/10.3390/ma8041666 - 13 Apr 2015
Cited by 26 | Viewed by 6995
Abstract
A novel metamaterial absorber design able to operate in the C frequency band is presented, along with an analysis and a method to improve both its bandwidth and its angular stability. Simulation results for a FR4-based design are shown for comparison with existing [...] Read more.
A novel metamaterial absorber design able to operate in the C frequency band is presented, along with an analysis and a method to improve both its bandwidth and its angular stability. Simulation results for a FR4-based design are shown for comparison with existing designs. In addition, a simplified equivalent circuit is provided for a better understanding of the great angular stability and wide bandwidth exhibited by the proposed structure. Moreover, simulations, manufacturing and measurements of a thinner and more flexible metamaterial absorber, keeping the angular stability of the former one, while providing a wide bandwidth, are presented. Full article
(This article belongs to the Section Manufacturing Processes and Systems)
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14 pages, 984 KB  
Article
A Six-Fold Symmetric Metamaterial Absorber
by Humberto Fernández Álvarez, María Elena De Cos Gómez and Fernando Las-Heras
Materials 2015, 8(4), 1590-1603; https://doi.org/10.3390/ma8041590 - 3 Apr 2015
Cited by 22 | Viewed by 7729
Abstract
A novel microwave metamaterial absorber design is introduced along with its manufacturing and characterization. Significant results considering both bandwidth and angular stability are achieved. Parametric analysis and simplified equivalent circuit are provided to give an insight on the key elements influencing the absorber [...] Read more.
A novel microwave metamaterial absorber design is introduced along with its manufacturing and characterization. Significant results considering both bandwidth and angular stability are achieved. Parametric analysis and simplified equivalent circuit are provided to give an insight on the key elements influencing the absorber performance. In addition, the constitutive parameters of the effective medium model are obtained and related to the absorber resonant behavior. Moreover, a new thinner and more flexible absorber version, preserving broad bandwidth and angular insensitive performance, is simulated, and an 8 × 8 unit-cells prototype is manufactured and measured for a limited angular margin in an anechoic chamber. Full article
(This article belongs to the Section Advanced Materials Characterization)
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