Abstract
A cylindrical lossy dielectric resonator array absorber is designed and verified by experiments. The designed cylindrical resonator array is made of a lightweight carbon multiwalled nanotube/epoxy composite material, and the gaps filled with polypropylene are used to fix the cylindrical array. Studies have shown that the lossy dielectric resonator array structure has dual-mode resonance characteristics, and the hybrid array composed of cylinders with different diameters can further generate multi-resonant coupling effects, thereby significantly improving the absorptivity. The total thickness of the designed absorber is 4 mm, and the normal incidence absorptivity is greater than 97% in the frequency range of 8–12 GHz. The measured results are consistent with the simulation, which verifies the reliability of the design concept and preparation method.
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