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1.长春师范大学 物理学院,吉林 长春 130032
2.中国科学院 长春光学精密机械与物理研究所 中国科学院光学系统先进制造技术重点实验室,吉林 长春 130033
3.光电装备与仪器先进制造技术吉林省重点实验室,吉林 长春 130033
Received:16 September 2021,
Revised:15 October 2021,
Published:10 April 2022
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焦健,徐念喜,陈新等.宽带复合耦合型频率选择表面[J].光学精密工程,2022,30(07):773-779.
JIAO Jian,XU Nianxi,CHEN Xin,et al.Broadband frequency selective surface based on composite coupling structure[J].Optics and Precision Engineering,2022,30(07):773-779.
焦健,徐念喜,陈新等.宽带复合耦合型频率选择表面[J].光学精密工程,2022,30(07):773-779. DOI: 10.37188/OPE.20223007.0773.
JIAO Jian,XU Nianxi,CHEN Xin,et al.Broadband frequency selective surface based on composite coupling structure[J].Optics and Precision Engineering,2022,30(07):773-779. DOI: 10.37188/OPE.20223007.0773.
为满足具有稳定传输特性的低剖面、宽带频率选择表面(Frequency Selective Surface, FSS)结构的需求,提出了一种基于复合耦合型结构的宽带FSS结构。基于相邻周期子单元间相位-振幅的相互调制作用,建立新型宽带FSS的物理模型。采用全波数值仿真方法分析新型宽带FSS的电磁传输特性,以及扫描角度对其电磁传输特性的影响。最后,采用印刷电路板技术制备500 mm×500 mm的实验样件,并利用自由空间法测试其传输特性。实验结果表明:该结构具有稳定传输的宽频带特性,其
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3 dB带宽为8.85 GHz,阻带顶部平坦、边缘陡直性较好,具有较好的入射角度稳定性。相邻周期子单元间相位-振幅相互调制作用理论为展宽FSS工作带宽提供了新方法,基于该方法设计的新型宽带FSS结构具有潜在的工程应用价值。
To meet the requirements of low profile and broadband frequency selective surface (FSS) structure with stable transmission characteristics, a novel broadband FSS based on composite coupling structure was proposed. Based on the phase-amplitude modulation between adjacent periodic sub-units, a novel broadband FSS model was established. Subsequently, its electromagnetic transmission characteristics and the influence of the scanning angle on its electromagnetic transmission characteristics were calculated using full-wave numerical simulations. Finally, an FSS prototype of 500 mm× 500 mm was fabricated using the printed circuit board (PCB) technology and tested using the free space method. The experimental results show that the proposed FSS structure has stable broadband characteristics, and its bandwidth at
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3 dB is 8.85 GHz. The top of the stopband is flat and its edge is steep. The FSS also shows good incident angle stability. Based on phase-amplitude modulation theory, a novel method to broaden the working bandwidth of FSS is proposed. The novel broadband FSS structure designed by this method has potential engineering significance.
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