Abstract
We have proposed an ultra-broadband dielectric-resonator-based microwave absorber with a water substrate. A dielectric resonator, which comprises two stacking cubic cavities and one cross-shaped cavity, was filled with water to provide ultra-broadband microwave absorption. The simulation results show that the absorptivity of the proposed absorber is greater than 90% in the frequency range from 16.52 GHz to the upper microwave frequency band of 100.00 GHz, with the relative absorption bandwidth of 143.3%. Moreover, the absorber is insensitive to wave polarization and has high absorptivity over a wide frequency range under oblique incidences. Thanks to the 3D-printing technology, the proposed microwave absorber can be fabricated precisely and cost-effectively. The experimental results demonstrated that the structure is capable of broadband absorption and wide-incident-angle stability. The proposed design of ultra-broadband absorbers has much potential in the fields of electromagnetic shielding and stealth technology.
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Funding
This research was financially supported by the National Natural Science Foundation of China (Grant No. 61871171), Aeronautical Science Foundation of China (Grant No. 2020Z0560P4001), and Fundamental Research Funds for the Central Universities of China (Grant No. JD2020JGPY0012)
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GSD and FC conceived the concept. WQC and ZCY performed the simulation and experiment. JY analyzed the data. GSD and ZPY guided the entire work. All the authors read and approved the final manuscript.
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Deng, G., Chen, W., Yu, Z. et al. 3D-Printed Dielectric-Resonator-Based Ultra-Broadband Microwave Absorber Using Water Substrate. J. Electron. Mater. 51, 2221–2227 (2022). https://doi.org/10.1007/s11664-022-09439-4
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DOI: https://doi.org/10.1007/s11664-022-09439-4