A High-Transmittance Frequency-Selective Rasorber Based on Dipole Arrays

A High-Transmittance Frequency-Selective Rasorber Based on Dipole Arrays

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This paper presents a frequency-selective rasorber whose transmission window sour punch straws bag locates at the higher frequency of absorption band.The accomplished rasorber is composed of dipole-like and slot arrays, and has realized the transmissive/absorptive performance.In every unit cell, each pair of dipole-like elements connected by vias is printed on the two sides of the substrate, and the coupling between long and short dipoles is suppressed by this structure.

A guiding circuit is studied based on the analysis of the current path, and the insertion loss of transmission window is significantly s?n nhà màu n?u ??t reduced by the surface current at the pass-band that is hindered to pass through lossy elements.The presented rasorber acts as an absorber at the low frequencies, while providing a high transmittance window at 5.6 GHz.

This design is elaborately optimized to achieve low reflection and angle-insensitive performance.Finally, the presented structure is validated by numerical simulations and experimental measurements.This rasorber could be used for secrecy communications among stealth facilities while providing stable broad-band absorptive properties.