Journal
JOURNAL OF APPLIED PHYSICS
Volume 116, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4891475
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Funding
- National Natural Science Foundation of China [11204225]
- Equipment Development Pre-research Shared Technology Fund Project [9140A10031212QT69120]
- Top Talents Lead Cultivation Project of Hubei Province
- China Postdoctoral Science Foundation [2012M521483, 2013T60751]
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It is a tough task to greatly improve the working bandwidth for the traditional flat microwave absorbers because of the restriction of available material parameters. In this work, a simple patterning method is proposed to drastically broaden the absorption bandwidth of a conventional magnetic absorber. As a demonstration, an ultra-broadband microwave absorber with more than 90% absorption in the frequency range of 4-40 GHz is designed and experimentally realized, which has a thin thickness of 3.7 mm and a light weight equivalent to a 2-mm-thick flat absorber. In such a patterned absorber, the broadband strong absorption is mainly originated from the simultaneous incorporation of multiple lambda/4 resonances and edge diffraction effects. This work provides a facile route to greatly extend the microwave absorption bandwidth for the currently available absorbing materials. (C) 2014 AIP Publishing LLC.
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