A Split-Ring Resonator-Loaded Honeycomb Sandwich Structure for Broadband Microwave Absorption
Source abstract
Abstract
Split-ring resonators are excellent left-handed metamaterials for significant electromagnetic coupling behavior. In this work, a split-ring resonator prepared with Ni-doped zeolitic imidazolate framework-67/epoxy resin (ZIF-67/ER) was embedded in the top layer to optimize microwave absorption efficiency in the 2–4 GHz frequency band. The Ni-doped ZIF-67/epoxy resin served as the bottom layer to improve microwave absorption efficiency in the 4–8 GHz frequency band. Honeycomb with a conductive carbon black coating served as the middle layer to generate electromagnetic loss for the overall frequency band. Based on the composite structure integration technology, RL < −10 dB was realized under the oblique incidence of 0–70 degrees. Both simulation and experiments indicate that a split-ring resonator made of lossy material can be an effective strategy to broaden the effective absorption bandwidth and increase the corresponding structure’s insensitivity to polarization and the incidence angle of microwave.
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Research context
OpenAlex topics: Advanced Antenna and Metasurface Technologies · Metamaterials and Metasurfaces Applications · Electromagnetic wave absorption materials
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Affiliations
State-Owned Wuhu Machinery Factory, Wuhu 241000, China
Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
References (24)
Show source-provided references
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