Kim Yongjune, Lee Jeong-Hae
Department of Electrical Engineering, The University of Suwon, Hwaseong 18323, Republic of Korea.
Department of Electronic and Electrical Engineering, Hongik University, Seoul 04066, Republic of Korea.
Materials (Basel). 2023 Mar 28;16(7):2692. doi: 10.3390/ma16072692.
In this study, a broadband metasurface absorber composed of an optimal combination of copper tiles connected with four chip resistors is designed and experimentally verified. After fixing the locations of the chip resistors and setting their resistances to 100 Ω, the genetic algorithm (GA) is utilized to design the optimal copper tile pattern for broadband absorption. The optimal combination of the copper tiles is identified by determining the states of the square tile pairs between copper or air, depending on the one or zero states of the bit sequence created by GA, respectively. The full-wave simulation results of the optimized metasurface absorber confirmed a -10 dB reflectance bandwidth within the frequency range of 6.57 to 12.73 GHz for the normal incidence condition, with the fractional bandwidth being 63.83%. The accuracy of the metasurface absorber was verified through an experimental result that matched well with the full-wave simulated one.
在本研究中,设计并通过实验验证了一种由与四个片式电阻相连的铜片的最佳组合构成的宽带超表面吸收器。在固定片式电阻的位置并将其电阻设置为100Ω后,利用遗传算法(GA)设计用于宽带吸收的最佳铜片图案。根据GA生成的比特序列的一或零状态,通过确定铜片或空气之间方形片对的状态来识别铜片的最佳组合。优化后的超表面吸收器的全波模拟结果证实,在垂直入射条件下,频率范围为6.57至12.73GHz时,反射率带宽为-10dB,分数带宽为63.83%。通过与全波模拟结果良好匹配的实验结果验证了超表面吸收器的准确性。