Multi-band microwave metamaterial absorber based on coplanar Jerusalem crosses |
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| Authors: | Wang Guo-Dong Liu Ming-Hai Hu Xi-Wei Kong Ling-Hua Cheng Li-Li Chen Zhao-Quan |
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| Affiliation: | a State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;b School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;c College of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan 232001, China |
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| Abstract: | The influence of the gap on the absorption performance of the conventional split ring resonator(SRR) absorber is investigated at microwave frequencies. Our simulated results reveal that the geometry of the square SRR can be equivalent to a Jerusalem cross(JC) resonator and its corresponding metamaterial absorber(MA) is changed to a JC absorber. The JC MA exhibits an experimental absorption peak of 99.1% at 8.72 GHz, which shows an excellent agreement with our simulated results. By simply assembling several JCs with slightly different geometric parameters next to each other into a unit cell, a perfect multi-band absorption can be effectively obtained. The experimental results show that the MA has four distinct and strong absorption peaks at 8.32 GHz, 9.8 GHz, 11.52 GHz and 13.24 GHz. Finally, the multi-reflection interference theory is introduced to interpret the absorption mechanism. |
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| Keywords: | Jerusalem cross multi-band metamaterial absorber multi-reflection interference theory |
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