Ultra-broadband microwave metamaterial absorber

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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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Ding, Fei, Yanxia Cui, Xiaochen Ge, Yi Jin and Sailing He (2012). Ultra-broadband microwave metamaterial absorber. Applied Physics Letters, 100(10). pp. 103506–103506. 10.1063/1.3692178 Retrieved from https://hdl.handle.net/10161/21724.

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Sheng-Yang He

Benjamin E. Powell Distinguished Professor of Biology

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Millions of years of co-evolution between plants and microbes have resulted in an intricate web of attack, counter-attack, decoy, and hijacking mechanisms in biology. Moreover, co-evolution between plants and microbes is greatly impacted by ongoing climate change. In our lab, we probe “host-microbe-climate” interactions to answer the following fundamental questions: (1) How do microbial pathogens infect a susceptible host? (2) How do plants select beneficial microbiomes to ensure health? (3) How do climate conditions impact disease and immunity?      

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