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(a) Schematic section of aDSR based FSS adopting a square lattice. (b) Unit cell with radius , width , cell size , asymmetry angle , and gap angle .
Reflection of FSS of symmetric (dashed line) and asymmetric DSRs with for a perfect conductor (dotted line) and for gold (solid line).
The -field in the resonator plane shows a strong concentration (white) at the ends of the arcs. , amplitude of excitation .
Dependency of the reflection on the asymmetry angle depicting (a) reflection spectra, (b) the derivative of the reflection amplitude, and (c) the maximum steepness as a function of the gap position.
DRF frequency shift upon dielectric loading with a -thick film. (a) Loading covers the complete surface. (b) Partial loading ( area) at the position of maximum -field concentration.
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