Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 50, Issue 38, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/aa81af
Keywords
all-dielectric; water-injected; oblique incidence; metamaterial absorber; wideband
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Funding
- National Natural Science Foundation of China [41474117]
- Project of Xinjiang Uygur Autonomous Region University Research Program [XJE-DU2016S074]
- Project for Teaching Research and Reform of Kashgar University [KJDY1514]
- Excellent Doctoral Project of Kashgar University [(15) 2544]
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We present a water-injected all-dielectric metamaterial that can offer an extremely wide bandwidth of electromagnetic absorption and prominent wide incident angle range. Different from conventional metal-dielectric based metamaterial absorbers, the absorption mechanism of the proposed all-dielectric metamaterial absorber is to take advantage of the dispersion of water, rather than electric or/and magnetic resonance, which thoroughly overcomes the defects of narrow bandwidth and oblique incidence from metal-dielectric based metamaterial absorber. The simulated absorption was over 90% in 8.1-22.9 GHz with the relative bandwidth of 95.5% when the incident angle reaches 60 degrees, and the corresponding microwave experiment is performed to support the simulations. The obtained excellent absorption performance reveals a possible application of the proposed absorber, which can be exploited for electromagnetic stealth purposes, especially for electromagnetic stealth of sea targets.
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