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Guided resonance filter (GRF) fabricated on a high index material with relative permittivity of 20. The lattice constant, is the air-hole radius.
MMW imaging system that based on a Agilent 85106D network analyzer: (a) the measuring setup, the wave is emitted by a horn antenna into the GRF. A monopole detector is positioned right behind the filter to collected the transmitted wave; (b) the Agilent network analyzer
3D–FDTD calculation (top) of plane wave incident into a PhC slab with the relative permittivity , lattice constant , slab thickness of and experimental measured transmission spectrum (bottom) of the GRF.
(a) Schematic image of the PhC slab, where the circles indicated cavities that are separated by the air-holes, and transmission spectrum through a single PhC slab with air hole radius and slab thickness , calculated by 3D-FDTD methods; (b) schematic image of a lattice of circular cavities and transmission spectrum of these cavities with the radius and height of the cavity , respectively. Both PhC slab and the lattice of cavities are fabricated in high K20 with permittivity of 20.
Three-dimensional FDTD simulation of the transmission spectrum of a uniform slab (dotted line) and a thickness PhC slab with permittivity of 20, and air-hole radius (solid line), and (dashed line), respectively.
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