双六边形环电路模拟吸波材料及其等效电路模型
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摘要
提出以双六边形环为单元结构的电路模拟吸波材料。根据单元的双频特性建立等效电路模型,根据六边形环周期分布规律提出等效周期概念,给出等效分布电参数的计算方法。利用该模型对双六边形环电路模拟吸波材料的结构进行参数分析,并与HFSS全波分析结果进行对比,验证该方法的准确性。加工样品和实测,结果发现所设计吸波材料在1. 9～8. 9 GHz频段内对正入射波具有良好的吸波特性,实测结果与等效电路模型仿真结果吻合较好,进一步验证了该方法的有效性。
A circuit analog absorber with double hexagonal loops units was proposed. An equivalent circuit model was established according to the dual-frequency characteristics of the units. The equivalent period concept was proposed by analyzing the periodic distribution of the units,and the extraction of distribution electrical parameters was given. The structural parameters were simulated and analyzed with the proposed method,the simulated results were in agreement with the results given by HFSS software,and the accuracy was verified. Finally,a sample was fabricated and measured. The measured results show good broadband absorption in 1. 9 ～ 8. 9 GHz for normal incidence,and the accuracy of the proposed method is verified further.
A circuit analog absorber with double hexagonal loops units was proposed. An equivalent circuit model was established according to the dual-frequency characteristics of the units. The equivalent period concept was proposed by analyzing the periodic distribution of the units,and the extraction of distribution electrical parameters was given. The structural parameters were simulated and analyzed with the proposed method,the simulated results were in agreement with the results given by HFSS software,and the accuracy was verified. Finally,a sample was fabricated and measured. The measured results show good broadband absorption in 1. 9 ～ 8. 9 GHz for normal incidence,and the accuracy of the proposed method is verified further.
引文
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[14]Sudhendra C,Ramkumar M A,Rao K A R K. Design,analysis, and implementation of space cloth based on hexagonal resistor grid network of planar resistors[J]. IEEE Microwave&Wireless Components Letters,2017,27(11):986-988.
[2]Joozdani M Z,Amirhosseini M K,Abdolali A. Wideband radar cross-section reduction of patch array antenna with miniaturised hexagonal loop frequency selective surface[J].Electronics Letters,2016,52(9):767-768.
[3]Ruvio G,Leone G,Mattiello F. Analysis and characterization of finite-size curved frequency selective surfaces[J]. Studies in Engineering&Technology,2015,2(1):9-21.
[4]Costa F,Monorchio A,Manara G. Analysis and design of ultra thin electromagnetic absorbers comprising resistively loaded high impedance surfaces[J]. IEEE Transactions on Antennas&Propagation,2010,58(5):1551-1558.
[5]Langley R J,Parker E A. Double-square frequency-selective surfaces and their equivalent circuit[J]. Electronics Letters,1983,19(17):675-677.
[6]Mittra R,Pelletti C,Tsitsas N L,et al. A new technique for efficient and accurate analysis of FSSs, EBGs and metamaterials[J]. Microwave&Optical Technology Letters,2012,54(4):1108-1116.
[7]Silva M W B,Kretly L C. An efficient method based on equivalent-circuit modeling for analysis of frequency selective surfaces[C]//Proceedings of the Microwave&Optoelectronics Conference,2013.
[8]王秀芝,高劲松,徐念喜.利用等效电路模型快速分析加载集总元件的微型化频率选择表面[J].物理学报,2013,62(20):421-425.WANG Xiuzhi,GAO Jinsong,XU Nianxi. Quick analysis of miniaturized-element frequency selective surface that loaded with lumped elements by using an equivalent circuit model[J]. Acta Physica Sinica,2013,62(20):421-425.(in Chinese)
[9]Han Y,Che W Q,Christopoulos C,et al. A fast and efficient design method for circuit analog absorbers consisting of resistive square-loop arrays[J]. IEEE Transactions on Electromagnetic Compatibility,2016,58(3):747-757.
[10]Costa F, Monorchio A,Manara G. Efficient analysis of frequency-selective surfaces by a simple equivalent-circuit model[J]. IEEE Antennas and Propagation Magazine,2012,54(4):35-48.
[11]Yang J,Shen Z X. A thin and broadband absorber using double-square loops[J]. IEEE Antennas and Wireless Propagation Letters,2007,6(11):388-391.
[12]Luo X F,Teo P T,Qing A,et al. Design of double-squareloop frequency-selective surfaces using differential evolution strategy coupled with equivalent-circuit model[J].Microwave&Optical Technology Letters,2005,44(2):159-162.
[13]Shang Y P,Shen Z X,Xiao S Q. On the design of singlelayer circuit analog absorber using double-square-loop array[J]. IEEE Transactions on Antennas&Propagation,2013,61(12):6022-6029.
[14]Sudhendra C,Ramkumar M A,Rao K A R K. Design,analysis, and implementation of space cloth based on hexagonal resistor grid network of planar resistors[J]. IEEE Microwave&Wireless Components Letters,2017,27(11):986-988.