Ultra-broadband Microwave Metamaterial Absorber

Details Ultra-broadband Microwave Metamaterial Absorber Ultra-broadband Microwave Metamaterial Absorber

2011-12-30

arxiv.org/abs/1201.0062v1

Physics

Optics

10 pages, 5 figures,submitted to APL

Scientific paper

A microwave ultra-broadband polarization-independent metamaterial absorber is demonstrated. It is composed of a periodic array of metal-dielectric multilayered quadrangular frustum pyramids. These pyramids possess resonant absorption modes at multi-frequencies, of which the overlapping leads to the total absorption of the incident wave over an ultra-wide spectral band. The experimental absorption at normal incidence is above 90% in the frequency range of 7.8-14.7GHz, and the absorption is kept large when the incident angle is smaller than 60 degrees. The experimental results agree well with the numerical simulation.

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